Atoms and the Periodic Table Test Review

Front

What is the number at the top of the box called?

Back

atomic number

Front

What does the number at the top of the box tell you about the atom?

Back

The number of protons

Front

What is the number at the bottom of the box called? Options: atomic number, mass number, valence electron, energy levels

Back

mass number

Front

What does the number at the bottom of the box tell you?

Back

The number of protons and neutrons in the nucleus

Front

What should you always do to the mass number when taking the test?

Back

Round it to the nearest integer

Front

How do you use the periodic table to find the number of neutrons in the fluorine atom?

Back

19 - 9

Answer explanation

Mass number - Atomic number

Front

How many protons, neutrons, and electrons are in an atom of magnesium?

Back

12p, 12e, 12n

Answer explanation

Atomic number = 12 so

p = 12

e = 12

Mass # - Atomic # = n

24 - 12. = 12

Front

What is the highest number of valence electrons an atom can have?

Back

8

Front

What part of the atom determines its chemical properties and reactivity? Options: protons, neutrons, electrons, valence electrons, nucleus

Back

valence electrons

Front

What part of the atom determines its identity?

Back

protons