Unit 2 Review

Multiple Choice

An element with 3 protons in each atom has an atomic number of:

• 1

• 2

• 3

• 4

Multiple Choice

An atomic number of 8 means the atom has ________ protons.

• 7

• 8

• 16

• 88

Multiple Choice

True or false: The atomic number of an element is the same as the number of protons of its atoms.

• True

• False

Multiple Choice

What is the atomic number of this nucleus?

• 1
• 3
• 4
• 7

Multiple Choice

What is the atomic number of this atom?

• 9
• 10
• 19
• 27

Multiple Choice

Which subatomic particles make up the mass of an atom?

• protons only

• protons and neutrons

• protons, neutrons and electrons

• protons and electrons

Multiple Choice

What is the atomic mass of an atom with 32 protons and 31 neutrons?

• 31

• 32

• 62

• 63

Multiple Choice

How many neutrons are there for an atom with a mass of 20 and 11 protons?

• 9

• 11

• 20

• 31

Multiple Choice

How many protons are there for an atom with 16 neutrons and atomic mass of 33?

• 16

• 17

• 18

• 33

Multiple Choice

What is the atomic mass of element 5 if it has 6 neutrons?

• 5

• 6

• 11

• 30

Multiple Choice

What is at the center of every atom?

• An electron
• A compound
• A molecule
• A nucleus

Multiple Choice

Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

Multiple Choice

What number indicates an electron?

• 1
• 2
• 3
• 4

Multiple Choice

Atomic Nucleus

• The outer shell of an atom that contains electrons.

• Positively charged subatomic particles.

• The small, dense region at the center of an atom.

• Subatomic Particles with a neutral (no) charge.

Multiple Choice

What is the mass of a carbon atom that has 6 protons, 7 neutrons, and 6 electrons?

• 6

• 7

• 13

• 19

Multiple Choice

Neutral atoms have an equal number of

• electrons and neutrons

• protons and neutrons

• protons and electrons

• protons, neutrons, and electrons

Multiple Choice

How many neutrons does calcium have?

• 20

• 40

• 60

• 0

Multiple Choice

Atoms of the same element with different numbers of neutrons are called

• Ions
• Isotopes
• Iotas
• Introns

Multiple Choice

The mass listed on the periodic table for each element is known as the 

• average atomic mass
• atomic mass
• atomic weight
• weighted mass

Multiple Choice

A student creates the model of a carbon-12 atom shown. He wants to add 3 more sub-atomic particles to the model to create a carbon-15 atom. Identify how many protons and neutrons he should add to the model.

• 3 Neutrons

  0 Protons

• 2 Neutrons

  1 Proton

• 1 Neutron

  2 Protons

• 0 Neutrons

  3 Protons

Multiple Choice

If an atom contains exactly three protons, then it's an atom of _____

• lithium
• gold
• nitrogen
• carbon

Multiple Choice

Which element is this?

• Nickel

• Neon

• Sodium

• Nitrogen

Multiple Choice

How many neutrons are in Magnesium?

• 36

• 12

• 24

• 6

Multiple Choice

How would you write the isotope name from this nuclide symbol?

• Sodium-23

• Sodium-11

• Sodium-12

• Sodium-22

Multiple Choice

To calculate average atomic mass, you need

• the atomic mass of each isotope

• the percent abundance of each isotope

• the atomic mass and percent abundance of each isotope

• to find the average of the atomic masses of each isotope

Multiple Choice

How are elements on the periodic table arranged by?

• in alphabetic order
• simular physical & chemical properties
• their symbols
• Just simular physical properties

Multiple Choice

Which group of the periodic table is composed of inert (not reactive) gases?

answer choices

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Multiple Choice

Which is an alkali metal?

• Magnesium

• Iron

• Sodium

• Europium

Multiple Choice

Name this group: These metals are the most reactive.

Multiple Choice

How many electrons are in Aluminium?

• 40

• 27

• 13

• 14

Multiple Choice

How many protons, neutrons, and electrons are in Oxygen?

• Protons = 8; Neutrons = 16; Electrons = 8

• Protons = 8; Neutrons = 8; Electrons = 8

• Protons = 16; Neutrons = 8; Electrons = 16

• Protons = 16; Neutrons = 24; Electrons = 16

Multiple Choice

How many valence electrons does Lithium (Li) have?

• 8

• 1

• 5

• 2

Multiple Choice

How many electrons can the first shell hold?

• 2

• 4

• 6

• 8

Multiple Choice

How many PROTONS / ELECTRONS does Potassium- K have?

• 11

• 19

• 37

• 87

Multiple Choice

Which is an electron?

• A
• B
• C