Chapter One, Structure & Bonding

Question 1

Each element has a unique number of _____, which is called its atomic number. In an uncharged atom, this number is also equal to the number of _____ present.

Answer 1

Protons, electrons

Question 2

What correctly describes isotopes?

Answer 2

Isotopes have different numbers of neutrons.

Isotopes have different mass numbers.

Question 3

The _____ of an atom is equal to the sum of the protons and neutrons in the nucleus of the atom.

Answer 3

Mass number

Question 4

What correctly describes the components of a neutral atom?

Answer 4

The nucleus contains positively charged protons.

Neutral atoms contain equal numbers of protons and electrons.

The electrons are located outside the nucleus of the atom.