Unit 2 review

Unit 2 review

Multiple Choice

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Multiple Choice

What is the atomic number of this atom?

• 1
• 3
• 4
• 7

Multiple Choice

What is the mass number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Multiple Choice

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Multiple Choice

How many electrons does a Copper atom have?

• 63

• 29

• 92

• 34

Multiple Choice

What is the atomic mass of Neon?

• 10

• 20.18

• 10.18

• 30.18

Multiple Choice

Typically in an atom, which two subatomic particles are equal in number?

• protons and neutrons

• all subatomic particles are equal in number

• neutrons and electrons

• protons and electrons

Multiple Choice

The nucleus of an atom contains which subatomic particles?

• protons and electrons

• protons and neutrons

• electrons and neutrons

• protons, electrons, and neutrons

Multiple Choice

What is the center of an atom called?

• The headquarters

• The centrometer

• The hypothesis

• The nucleus

Multiple Choice

Which subatomic particle has a negative charge?

• proton

• neutron

• electron

• cybertron

Multiple Choice

Which subatomic particle has a positive charge?

• proton

• neutron

• electron

• midichlorian

Multiple Choice

How many neutrons does the isotope below have?     ⁸⁹ ₃₆Kr

• 53
• 36
• 89
• 125

Multiple Choice

which atom has  4 neutrons?

• Li-6
• Li-7
• Li-8
• they have the same # of neutrons

Multiple Choice

What quantities vary between isotopes of an element?

• protons, electrons, and atomic mass
• protons, electrons, and atomic number
• neutrons and electrons
• neutrons and atomic mass

Multiple Choice

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Multiple Choice

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Multiple Choice

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Open Ended

Magnesium has 3 naturally occurring isotopes: Mg-24 (78.99% with a mass of 23.99 amu), Mg-25 (10.00% with a mass of 24.99 amu) , and Mg-26 (11.01% with a mass of 25.99 amu).  What is the average atomic mass of magnesium?

Multiple Choice

4.35% of all X atoms have a mass of 39.946 amu. 83.79% have a mass of 41.941 amu, 9.50% have a mass of 42.941 amu, and 2.36% have a mass of 43.939 amu. What is the average atomic mass of atom X?

• 41.97 amu

• 42.19 amu

• 10.43 amu

• 40.04 amu

Multiple Choice

An Arsenic atom wants to form...

• An anion
• A cation
• An onion
• A cuddly kitten friend

Multiple Choice

Barium atoms want to form...

• an anion
• a cation
• an onion
• a cuddly kitten friend

Multiple Choice

If an atom loses electrons, the charge will be positive.

• true

• false

Multiple Choice

Which types of elements from anions?

• metals

• nonmetals

• metalloids

• noble gases

Multiple Choice

Which types of elements from cations?

• metals

• nonmetals

• metalloids

• noble gases

Multiple Choice

What is a negative ion called?

• anion

• cation

• covalent

• isotope

Multiple Choice

What is a positive ion called?

• anion

• cation

• isotope

• covalent

Multiple Choice

How many atoms of Oxygen are in Fe(NO₃)₃ ?

• 6

• 3

• 9

• 1

Multiple Choice

How many Hydrogen atoms in 3(NH₄)₂CrO₄?

• 4

• 2

• 8

• 24

Multiple Choice

A subscript is the small number below a(n) ________ that tells the number of _______ of that element.

• element symbol; atoms
• atom; element symbol
• subscript; protons
• compound; elements

Multiple Choice

How many Hydrogen are in 4H₂O?

• 6

• 8

• 2

• 4

Multiple Choice

Molecules that are made of more than one type of atom are called?

• Molecules

• Elements

• Mixtures

• Compounds

Multiple Choice

Which chemical formula correctly displays 1 atom of nickel and 2 atoms of Fluorine?

• niF2

• NIF₂

• Ni₁F₂

• NiF₂

Multiple Choice

How many elements are in this chemical formula?

HCl

• 1

• 2

• 3

• 4

Multiple Choice

What does the subscript in a chemical formula tell you?

• How many molecules are present

• How many atoms are present

• How many elements are present

• How many neutrons are present

Multiple Choice

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol

Multiple Choice

Calculate the molar mass of KOH.

• 28 g/mol

• 56 g/mol

• 84 g/mol

• 112 g/mol

Multiple Choice

What id the molar mass of UF₆?

• 101 g/mol

• 238 g/mol

• 257 g/mol

• 352 g/mol

Multiple Choice

What is the molar mass of Cl₂?

• 17 g/mol

• 35.5 g/mo;

• 71.0 g/mol

• 89 g/mol

Multiple Choice

How many molecules are there in 31.8 moles of water?

• 5.28 x 10^-23 molecules

• 1.91 x 10²⁵ molecules

• 5.28x 10-²⁵

• 1.91 x 10²²

Multiple Choice

The mass of one mole of an element is equal to

• its atomic number from the periodic table, but in amus.

• its atomic mass from the periodic table, but in amus.

• its atomic mass from the periodic table, but in grams.

• its atomic number from the periodic table, but in grams.

Multiple Choice

How many moles of copper are 4.57 x 10¹³ atoms of copper?

• 7.59 x 10^-11 moles

• 2.75 x 10³⁷ moles

• 7.59 x 10¹¹ moles

• 2.75 x 10³³ moles

Multiple Choice

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆? 

• 1 mole = 78.12 g
• 1 mole = 22.4 L 
• 1 mol = 6.02x 10²³ particles 
• more than one

Multiple Choice

Calculate the number of atoms in 0.0340 g Zn.

• 5.20 x 10^-4 atoms Zn

• 3.13 x 10²³ atoms Zn

• 3.13 x 10²⁰ atoms Zn

• 2.05 x 10²² atoms Zn

Multiple Choice

What is the mass of 1.2 x 10²⁴ atoms of C?

• 2.0 grams

• 24 grams

• 0.17 grams

• 1.4 x 10²⁵ grams

Multiple Choice

Determine the mass of 4.20 moles of C₆H₁₂

• 353 g

• 0.0499 g

• 337 g

• 2.53 x 10²⁴ g

Multiple Choice

Shivani measures out 6.0 moles of epsom salt (MgSO₄) to put in her bath. How many grams of MgSO₄ went in the bath?

• 3.6 x 10²⁴ g

• 720 g

• 0.050 g

• 340 g