Chemistry Review

Which element is this?

• Nickel

• Neon

• Sodium

• Nitrogen

Name this element.

• Neon

• Magnesium

• Sodium

• Manganese

What is the atomic number of this atom?

• 2

• 4

• 6

• 8

What is this element?

• Beryllium (atomic #4)

• Boron (atomic #5)

• Carbon (atomic #6)

• Nitrogen (atomic #7)

How many valence electrons?

• 2

• 3

• 4

• 5

What is a valence electron?

• Electrons in the first energy shell

• Electrons in the second energy shell

• Electrons in the outer shell

• Total number of electrons

What element is represented in this Bohr Model?

• Carbon

• Hydrogen

• Aluminum

• Lithium

Why do all bonds form?

• to fill the outermost energy level

• so an atom can be unstable

• so the number of protons and electrons can equal.

• so they can gain neutrons.

Valence electrons are found

• outermost energy level

• innermost energy level

• some where in the electron cloud

How do covalent bonds form?

• by sharing electrons between atoms

• by donating or receiving electrons