What orbits the nucleus of an atom?

What are the 3 parts of the atom?

Atomic number of Beryllium (Be)

Atomic mass of Nitrogen (N)

The number of protons in an atom are equal to the

atomic ________.

The number of electrons in an atom are equal to the

atomic ________.

The number of neutrons in an atom are equal to the

atomic ________.

The first energy level of an atom can hold up to ___ electrons.

The second energy level of an atom can hold up to ___ electrons.

The valance level of an atom can never have more than ___ electrons.

Electricity is formed by the movement of ______.

Protons have a _____ charge.

Electrons have a ____ charge.

How many electrons does this atom have?

Which of these is the correct drawing for Ca (which has an atomic number of 20 and an atomic mass of 40)?

A device or material that permits current to flow through it easily is a(n) __________________.

A device or material that slows or obstructs current to flow through it easily is called a(n) ________________________.

Metals

Brittle

Allows the flow of electricity.

Combination of metallic and non-metallic properties

4 Valence Electrons

Metalloids

5-8 Valence Electrons

Poor conductors of electricity

Conduct heat and electricity better than insulators, but not as good as metals.

Malleable

Non-Metals

1-3 Valence Electrons