Chemistry Midterm Review

Front

What atom matches this electron configuration? 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰

Back

Zinc

Front

How many valence electrons does a neutral bromine atom have?

Back

7

Front

How many of each kind of atom are in zinc phosphide, Zn₃P₂?

Back

3 Zinc and 2 Phosphorus

Front

For an atom to be neutral, the number of protons must equal what?

Back

the number of electrons

Front

Atoms of the same element with different numbers of neutrons are called what?

Back

isotopes

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

What is an ion?

Back

An atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

Define isotopes.

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is the formula for calculating the number of neutrons in an atom?

Back

Number of Neutrons = Atomic Mass - Atomic Number.