Which element behaves the MOST like calcium and why?

Ba, because it is in the same group and has same number of valence electrons.

K, because it is in the same period and only has one less valence electron.

Br, because it is in the same period and has more valance electrons.

Sc, because it is in the same period and has one more valence electron.

Based on the properties of elements 1, 2, and 3, in which section of the periodic table would you find them?

Element 1 Section A Element 2 Section B Element 3 Section C

Element 1 Section C Element 2 Section B Element 3 Section A

Element 1 Section B Element 2 Section A Element 3 Section C

Element 1 Section B Element 2 Section C Element 3 Section A

Sandy was studying a model of a group of atoms. Which of the following statements is TRUE for the atoms shown?

The mass number of the atoms is different because the number of neutrons is different.

The mass number of the atoms is the same because the number of protons is the same.

The atomic number of the atoms is different because the number of neutrons is different.

The atomic number of the atoms is same because the number of electrons is the same.

Is this chemical equation balanced? Why or why not? Choose the BEST answer.

No, none of the elements (carbon, hydrogen, or oxygen) are the same amount on both the reactant and product side.

Yes, the amount of atoms for each element are equal on both the reactant and product side.

No, the carbons are not the same number on both the reactant and product side.

No, neither the carbons or hydrogens are the same amount on both the reactant and product side.

Semester 2 physical science exam Quiz

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which compound shows a correctly written formula between the atoms shown?

AlAr

AlAr₃

AlCl

AlCl₃

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What type of reaction is the following:
$2NaHCO_3->\ Na_2CO_3+CO_2+H_2O$

Combination

Decomposition

Single Replacement

Double Replacement

Combustion

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

the starting materials in a chemical reaction

Products

Reactants

Starters

Enders

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

If reaction starts with 20g of reactants it should produce...

a total of 40g of product

a total of 10g of product

a total of 80 g of product

a total of 20g of product

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A chemical reaction that absorbs heat

Single replacement

Exothermic

Endothermic

Decomposition

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If the reactants on the left side of a chemical equation are C₃H₈ + 5O₂, the products in a balanced equation could be

4CO₂ + 3H₂O

3CO₂ + 4H₂O

2CO₂ + 3H₂O

3CO + 4H₂O

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is appropriate for determining the the IUPAC nomenclature for N₂O?

Locate the position of the metal ion in N₂0.

The prefixes should be used for both nitrogen and oxygen.

Use Roman numeral II for the nitrogen since it has 2 atoms.

A prefix is only needed for nitrogen because each molecule

contains 2 nitrogen atoms.

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Semester 2 physical science exam

Which compound shows a correctly written formula between the atoms shown?

What type of reaction is the following:
$2NaHCO_3->\ Na_2CO_3+CO_2+H_2O$

the starting materials in a chemical reaction

If reaction starts with 20g of reactants it should produce...

A chemical reaction that absorbs heat

If the reactants on the left side of a chemical equation are C₃H₈ + 5O₂, the products in a balanced equation could be

Which of the following is appropriate for determining the the IUPAC nomenclature for N₂O?

Which of the following lists of elements is ordered by increasing number of valence electrons?

When forming a bond, which ion will aluminum form?

What reaction has the following general formula:
A + B --> AB

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Semester 2 physical science exam

Which compound shows a correctly written formula between the atoms shown?

What type of reaction is the following: 2NaHCO3−> Na2CO3+CO2+H2O2NaHCO_3->\ Na_2CO_3+CO_2+H_2O2NaHCO3​−> Na2​CO3​+CO2​+H2​O

the starting materials in a chemical reaction

If reaction starts with 20g of reactants it should produce...

A chemical reaction that absorbs heat

If the reactants on the left side of a chemical equation are C₃H₈ + 5O₂, the products in a balanced equation could be

Which of the following is appropriate for determining the the IUPAC nomenclature for N2O?

Which of the following lists of elements is ordered by increasing number of valence electrons?

When forming a bond, which ion will aluminum form?

What reaction has the following general formula:A + B --> AB

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Discover more resources for Science

What type of reaction is the following:
$2NaHCO_3->\ Na_2CO_3+CO_2+H_2O$

Which of the following is appropriate for determining the the IUPAC nomenclature for N₂O?

What reaction has the following general formula:
A + B --> AB