Unit 1B Atoms

Match it! Select the correct answer from the pull down...Good luck!

The atomic number identifies the element. The atomic number is the number of ____ in the nucleus of its atoms.

The charge and location of neutrons in an atom are, respectively,

Mass number is the number of

Isotopes of an element have the same number of __ but a different number of __.

For an atom to be neutral it must have

It has 20 protons and 18 electrons. The element is ___ and it has a charge of ___. (hint: use your periodic table)

The charge on an ion can be calculated as

A sodium atom has a mass number of 24. How many neutrons does it have? (Hint: figure out the number of protons using the periodic table)