Chapter 3 Section 2 Flashcard

Front

What is the central part of an atom known as?

Back

Nucleus

Front

What is the top number above the element symbol on the periodic table that tells you the number of protons in the nucleus of each atom of that element?

Back

Atomic number

Front

In chemistry, what is a horizontal row of elements in the periodic table called?

Back

Period

Front

What does the atomic number tell you?

Back

The number of protons and electrons in an atom.

Front

What is an electron that is found in the outermost shell of an atom called?

Back

Valence electron

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of a neutron?

Back

No charge (neutral).

Front

What is the charge of an electron?

Back

Negative charge.

Front

What is the term for the number of protons and neutrons in an atom?

Back

Mass number.

Front

What do you call a vertical column of elements in the periodic table?

Back

Group.