What are the basic units of chemical elements?

• atoms

• elements

• molecules

• structures

Which of the following are included in the nucleus of an atom? (Select all that apply.)

• Proton

• Electron

• Neutron

• Electron Cloud

Where are the electrons located in the atom?

• Nucleus

• Center

• Electron Cloud

• With the protons and neutrons

Which subatomic particle has no charge?

• Neutron

• Proton

• Electron

• Neutrals

Which two subatomic particles equal each other in a NEUTRAL atom? (Select all that apply.)

• Proteins

• Protons

• Neutrons

• Electrons

What are held in the shells/rings?

• Protons

• Neutrons

• Nucleus

• Electrons

How many electrons are required for stability in the first shell?

• 1

• 2

• 3

• 4

In the second shell, how many electrons are required so that the atom is stable and not reactive?

• 8

• 2

• 10

• 1

The ____ rule explains that atoms with fewer than 8 electrons in their outermost shell will try to share, gain, or lose electrons to become stable.

• octet

• quartet

• triad

• diad