4 Al + 3O 2 → 2Al 2 O 3 What does the "3" in front of O 2 stand for?

It indicates that there are 3 separate oxygen molecules in the reaction.

It indicates that there are 5 oxygen atoms after you add the coefficient and the subscript.

It indicates that that there are are total of 6 oxygen atoms bonded together.

It indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction.

The term "3 FeCl 2 " in a balanced equation says

that there are three formula units, each consisting of two chloride ions bonded to an iron(II) ion

that there are three iron(II) ions and two chloride ions bonded together.

that there are three iron(II) ions and 6 chloride ions bonded together.

that there are three particles, each consisting of three iron atoms and 6 chlorine atoms.

Nitrogen can ionically bond with an unknown element X from group 2. How many ions of element X are required to create a stable ionic compound with nitrogen?

There is not enough information.

Unknown element X is a metal that ionically bonds to sulfur. Is the formula, X 3 S feasible? Why or why not?

No, it is not feasible. Three metallic ions cannot provide the exact number of electrons that one sulfur needs for the ionic bond.

It is feasible. The three metallic ions each receive an electron from sulfur.

No, it is not feasible. Sulfur cannot give three electrons to the metal since the sulfide ion has a -2 charge.

No, it is not feasible. The metallic ion X only has one valence electron and the sulfide ion receives two electrons.

NH 3 is nitrogen trihydride (ammonia) and BF 3 is boron trifluoride. What is the name for AlCl 3 and why?

Aluminum chloride - It does not have the prefix "tri-" since it is ionic.

Monoaluminum trichloride - There is only one aluminum and it needs the prefix "mono-".

Aluminum trichloride - It has the prefix "tri-" since it has the same ratio as the other compounds.

Aluminum chloride - Ionic compounds do not get a prefix on the first name if there is only one of that element.

After some wood has completely burned in a fire, some of the matter that made up the wood has been destroyed. Is the statement correct or incorrect? Explain.

It is incorrect. Capture and collect all of the gases given off by the fire and combine these masses with the mass of the left over ashes. This should equal the mass of the original wood.

It is correct. The ashes weigh less than the original wood and this proves that some of the mass was destroyed.

It is incorrect. Ashes look different than wood but the mass of the ashes is the same as the mass of the original wood.

It is incorrect. Look at the ashes under the microscope. These particles will look exactly like the particles in the wood.

Using IUPAC nomenclature, give the name of BH 3 and AlH 3 and elaborate why that name is correct.

boron trihydride - boron and hydrogen are both non-metals and form covalent bonds. aluminum hydride - aluminum is a main group metal and hydrogen is a non-metal and they form ionic bonds.

boron trihydride & aluminum trihydride - both molecules combine two non-metals and form covalent bonds.

boron hydride & aluminum hydride - both compounds combine a main group metal and a non-metal to form ionic bonds.

boron hydride - boron is a main group metal and hydrogen is a non-metal and they form ionic bonds. aluminum trihydride - aluminum and hydrogen are both non-metals and form covalent bonds.

Write a balanced chemical equation for the decomposition of solid sodium sulfide in aqueous solution.

Na 2 S (s) → 2Na + (aq) + S 2- (aq)

Na 2 S (s) → Na + (aq) + S (s)

NaS 2(s) → Na + (aq) + 2S 2- (aq)

Na 2 S (aq) → 2Na + (s) + S 2- (s)

When naming ternary compounds such as HNO 3 , the structure of the compound helps predict the name of compound. Which statement is not correct in naming this compound?

The presence of oxygen in the anion indicates the prefix "hydro-" is used.

Yhe hydrogen cation indicates that the compound is an acid.

The name of the anion predicts the name of the final molecule.

The number of oxygen atoms in the anion indicates use of the "-ic" suffix.

The structure of the compound or molecule helps predict the name of compound. Given the binary molecule HCl, which statement does not follow the IUPAC nomenclature rules?

The two nonmetals indicate that covalent naming rules apply.

The hydrogen cation indicates that the compound is an acid.

The name of the anion predicts the name of the final molecule.

The lack of oxygen in the anion indicates the prefix "hydro-" is used.

Elaborate on what can be learned about the properties by the location of element on the periodic table. Use atomic number 13 as an example.

It is a main group metal, has 3 valence electrons, becomes a cation with a +3 charge, and is ductile, malleable, and conductive.

It is a non-metal, has 3 valence electrons, becomes a cation with a -3 charge, and is brittle, moldable, and non-conductive.

It is a metalloid, has 3 valence electrons, becomes a cation with a -5 charge, and is workable, inelastic, and non-conductive.

It is a transition metal, has 1 valence electrons, becomes a cation with a +1 charge, and is ductile, malleable, and conductive.

Periodic law states that when the elements are arranged according to their atomic numbers, this allows elements with similar properties to appear at regular intervals. Predict the group of elements and their number of valence electrons that will combine in a 3:2 ratio to with calcium.

nitrogen, phosphorus, arsenic; 5

Elaborate on the differences between metals and noble gases.

Noble gases have a full shell of valence electrons while metals have only a few valence electrons.

Valence electrons are different - metals have a full shell while noble gases have less than half a shell.

Metals have a nearly full shell of valence electrons while noble gases have a half shell of valence electrons.

All electrons are different - noble gases have a full shells while metals have greater than half shells

Elaborate on the classification of boron.

Boron is a metalloid and has properties of both metals and nonmetals - it appears dull but is ductile and forms both basic and acidic oxides.

Boron is a noble gas and has a full valence electron shell, is chemically non-reactive, colorless, odorless, and low boiling point.

Boron is a metal and is shiny, malleable, ductile, conducts heat and electricity, forms basic oxides, and forms cations in aqueous solution.

Boron is a nonmetal and is dull, brittle, poor conductor of heat and electricity, forms acidic oxides, and forms anions in aqueous solution.

Using the periodic table and your knowledge of atomic structure. Would Carbon-14 have more, less or the same number of neutrons as a typical carbon atom? How do you know?

It has more neutrons. Its mass number is larger than the atomic mass number for carbon

The same number of neutrons. All carbon atoms have atomic number 6.

The periodic table cannot give you the information needed to answer this question.

It has less neutrons. Its mass number is smaller than the one on the periodic table.

Elaborate what knowing that carbon-14 has an atomic number of 6 tells us about the atom.

Carbon-14 contains 6 electrons, 6 protons, and 8 neutrons.

Carbon-14 contains 6 baryons, 7 prions, and 8 neutrons.

Carbon-14 contains 7 electrons, 7 protons, and 7 quarks.

Carbon-14 contains 8 electrons, 6 photons, and 6 neutrons.

What conclusions can be drawn about the existence of nitrogen-14 and nitrogen-15?

They are isotopes of nitrogen and they contain the same number of protons and electrons but each contains a different number of neutrons - 7 and 8 respectively.

They are the same form of nitrogen and they include the same number of electrons and neutrons but each contains a different number of protons - 7 and 8 respectively.

They are several allotropes of nitrogen and they accommodate the same number of neutrons but each contains a different numbers of protons and electrons - 7 and 8 respectively.

They are different configurations of nitrogen and they consist of the same number of protons and neutrons but each contains a different number of electrons - 7 and 8 respectively.

Using the periodic table, elaborate the difference between the number of electrons in an oxygen-16 atom and an oxygen-18 atom.

The number of electrons are the same for all isotopes of an element - so both oxygen-16 and oxygen-18 contain 8 electrons.

These configurations differ in their number of electrons - so they contain 8 and 9 electrons, respectively.

Allotropes vary in their number of electrons - so oxygen-16 and oxygen-18 contain 8 and 10 electrons, respectively.

Oxygen atoms fluctuate in their number of electrons - so oxygen-16 and oxygen-18 contain 7 and 9 electrons, respectively.

Hydrogen is in Group 1A of the periodic table, known as the alkali metals, although it obviously isn't a metal. What is the reason for its placement in this group?

Hydrogen has the same electron configuration as alkali metals

Hydrogen is a metal, but has an extremely low vaporization point.

There isn't room for hydrogen on the right side of the table with other nonmetals.

Scientists didn't want to reconfigure the periodic table after they discovered that hydrogen wasn't a metal.

Chemistry Unit Review

Authored by William Gay

Chemistry, Science

9th - 11th Grade

NGSS covered

Used 72+ times

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

Content View

Student View

39 questions

Show all answers

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which statement accurately describes covalent bonds?

Covalent bonds are formed by metals and nonmetals.

Covalent bonds are typical of carbon compounds.

Covalent bonds are created by the attractions between oppositiely charged ions.

Covalent bonds break apart when dissolved in water and allow for the conduction of electricity.

Tags

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In solid NaCl, each sodium ion is surrounded by six chlorine ions and each chlorine ion is surrounded by six sodium ions. This arrangement results in a

malleable noncrystalline structure.

ductile, malleable solid with mobile electrons.

weak crystalline solid that conducts electricity.

high melting point and strong intermolecular forces.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-3

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

During a physical science lab investigating chemical reactions, several students placed a 30g antacid tablet in a 30g zip-lock bag. They recorded the masses of the tablet, and the bag. Then they added 50 grams of water and quickly sealed the bag. The tablet began to fizz and soon disappeared. The bag was filled with gas. If the mass of the liquid after the reaction is completed is still 50 grams, how much gas is produced?

30 grams

50 grams

80 grams

90 grams

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Sodium chloride, NaCl, is formed when a sodium atom transfers its electron to a chlorine atom. The difference in charge between the two atoms creates a(n) ___________ attraction that bonds them together.

electrostatic

elementary

gravitational

nuclear

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS2-4

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Use the IUPAC nomenclature rules to give the name for this compound - Ca₂S₃.

calcium sulfide

calcium (II) sulfide

dicalcium trisulfide

calcium (III) sulfide

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The decomposition of water into hydrogen gas H₂ and oxygen gas O₂ can be modeled by the balanced chemical equation

H₂ + O₂ → H₂O

H2O → H2 + O2

2H₂ + O₂ → 2H₂O

2H₂O → 2H₂ + O₂

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Calcium metal reacts with a potassium chloride solution to form calcium chloride and potassium ions. Balance this reaction.

___Ca_(s) + ___KCl_(aq) → CaCl_2(s) + ___K⁺_(aq)

1, 2, 1, 2

1, 2, 1, 1

1, 1, 1, 1

2, 1, 2, 1

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

40 questions

Wavelength and Frequency

Quiz

•

10th - 12th Grade

36 questions

Peridic Table Study guide

Quiz

•

9th - 11th Grade

44 questions

Fuerzas intermoleculares

Quiz

•

10th Grade

40 questions

pengetahuan umum

Quiz

•

10th Grade

35 questions

Challenge Me!

Quiz

•

10th Grade

40 questions

Latihan Soal TKR

Quiz

•

KG - 12th Grade

41 questions

BMT I Unit 5 Emerging & Re-emerging Infectious Diseases

Quiz

•

9th - 12th Grade

35 questions

Working Scientifically

Quiz

•

10th Grade

Popular Resources on Wayground

15 questions

Fractions on a Number Line

Quiz

•

3rd Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

29 questions

Alg. 1 Section 5.1 Coordinate Plane

Quiz

•

9th Grade

$fractions$

22 questions

fractions

Quiz

•

3rd Grade

11 questions

FOREST Effective communication

Lesson

•

20 questions

Main Idea and Details

Quiz

•

5th Grade

20 questions

Context Clues

Quiz

•

6th Grade

Discover more resources for Chemistry

22 questions

Unit 9 Gas Law Quiz

Quiz

•

10th Grade

10 questions

Exploring Types of Chemical Reactions

Interactive video

•

6th - 10th Grade

20 questions

Types of Chemical Reactions

Quiz

•

9th - 12th Grade

20 questions

Acids and Bases

Quiz

•

10th Grade

30 questions

Energy Review

Quiz

•

9th Grade

7 questions

GCSE Chemistry - Balancing Chemical Equations #4

Interactive video

•

9th - 10th Grade

20 questions

Chemistry: Classification of Matter

Quiz

•

10th Grade

40 questions

Unit 3 (Part 1) Chemical Equations & Reactions Review Game

Quiz

•

8th - 12th Grade

Chemistry Unit Review

Which statement accurately describes covalent bonds?

In solid NaCl, each sodium ion is surrounded by six chlorine ions and each chlorine ion is surrounded by six sodium ions. This arrangement results in a

Sodium chloride, NaCl, is formed when a sodium atom transfers its electron to a chlorine atom. The difference in charge between the two atoms creates a(n) ___________ attraction that bonds them together.

Use the IUPAC nomenclature rules to give the name for this compound - Ca₂S₃.

The decomposition of water into hydrogen gas H₂ and oxygen gas O₂ can be modeled by the balanced chemical equation

Calcium metal reacts with a potassium chloride solution to form calcium chloride and potassium ions. Balance this reaction.

___Ca_(s) + ___KCl_(aq) → CaCl_2(s) + ___K⁺_(aq)

The electrostatic attractions in crystalline salts, such as sodium chloride, are formed by __________ between positive and negative ions.

4 Al + 3O₂ → 2Al₂O₃
What does the "3" in front of O₂ stand for?

The term "3 FeCl₂" in a balanced equation says

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Chemistry Unit Review

Which statement accurately describes covalent bonds?

In solid NaCl, each sodium ion is surrounded by six chlorine ions and each chlorine ion is surrounded by six sodium ions. This arrangement results in a

Sodium chloride, NaCl, is formed when a sodium atom transfers its electron to a chlorine atom. The difference in charge between the two atoms creates a(n) ___________ attraction that bonds them together.

Use the IUPAC nomenclature rules to give the name for this compound - Ca2S3.

The decomposition of water into hydrogen gas H2 and oxygen gas O2 can be modeled by the balanced chemical equation

Calcium metal reacts with a potassium chloride solution to form calcium chloride and potassium ions. Balance this reaction.___Ca(s) + ___KCl(aq) → CaCl2(s) + ___K+(aq)

The electrostatic attractions in crystalline salts, such as sodium chloride, are formed by __________ between positive and negative ions.

4 Al + 3O2 → 2Al2O3﻿What does the "3" in front of O2 stand for?

The term "3 FeCl2" in a balanced equation says

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Use the IUPAC nomenclature rules to give the name for this compound - Ca₂S₃.

The decomposition of water into hydrogen gas H₂ and oxygen gas O₂ can be modeled by the balanced chemical equation

Calcium metal reacts with a potassium chloride solution to form calcium chloride and potassium ions. Balance this reaction.

___Ca_(s) + ___KCl_(aq) → CaCl_2(s) + ___K⁺_(aq)

4 Al + 3O₂ → 2Al₂O₃
What does the "3" in front of O₂ stand for?

The term "3 FeCl₂" in a balanced equation says