Atoms and the Periodic Table Test Review

To calculate the number of neutrons, one would need to

• Number of neutrons = Atomic mass number - Atomic number
• Number of neutrons = Atomic number x Atomic mass number
• Number of neutrons = Atomic mass number - Mass number
• Number of neutrons = Atomic number + Atomic mass number

Protons, neutrons, and electrons are examples of

• subatomic particles
• elements
• molecules
• atomic particles

Tags

NGSS.MS-PS1-1

The lightest of the subatomic particles is the

• electron
• atom

• neutron
• proton

An atom containing 7 protons, 8 neutrons, and 7 electrons

• is a neutrally charged atom

• is an ion

• none of the choices are correct

• cannot exist

Tags

NGSS.MS-PS1-1

Which of the following elements has only 12 protons?

• Magnesium
• Calcium
• Silicon
• Aluminum

Ions are formed when atoms

• gain or lose protons
• gain or lose electrons
• remain neutral
• combine with other atoms

Isotopes are

• Isomers that have the same molecular formula but different structures.
• Variants of a chemical element with the same number of protons but different numbers of neutrons.
• Atoms with the same number of neutrons but different numbers of protons.
• Different elements that have the same atomic mass.

The nucleus of an atom consists mainly of

• photons and neutrinos
• protons and neutrons
• quarks and leptons
• electrons and positrons

Tags

NGSS.HS-PS1-8

The atomic number of fluorine is

• 10
• 8
• 7
• 9

The number of neutrons in an atom is equal to the

• atomic mass number minus atomic number
• atomic number plus atomic mass number
• atomic number divided by atomic mass number
• atomic mass number times two