Periodic Table Exam Review

What is an atom?

• A. A type of molecule

• B. The smallest unit of matter that retains properties of an element

• C. A negatively charged particle

• D. The space around the nucleus

A proton has what charge?

• Negative

• Positive

• Neutral

• No charge

A neutron has what charge?

• Positive

• Negative

• Neutral

• No charge

An electron has what charge?

• Negative

• Positive

• Neutral

• Both positive and negative

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The atomic number tells you the number of:

• Protons

• Neutrons

• Electrons only

• Protons + Neutrons

The atomic mass is best described as:

• Only the protons in an atom

• Only the neutrons in an atom

• The weighted average mass of all isotopes of an element

• Always equal to the atomic number

Tags

NGSS.HS-PS1-7

The mass number is:

• Number of protons only

• Number of electrons + protons

• Number of protons + neutrons

• Atomic number × 2

What particles are in the nucleus of an atom?

• Protons only

• Electrons only

• Protons and neutrons

• Neutrons and electrons

Where are electrons found?

• Inside the nucleus

• Outside the nucleus in energy levels

• Mixed with neutrons

• Mixed with protons

Which two particles determine the mass number?

• Protons and neutrons

• Protons and electrons

• Neutrons and electrons

• Electrons only