Front

Atomic radius generally increases as we move __________.

Back

down a group and from right to left across a period.

Front

A negatively charged subatomic particle that exists in various energy levels outside the nucleus of an atom.

Back

electron

Front

Vertical columns of elements (families) on the periodic table with similar properties are called __________.

Back

groups.

Front

The tendency of an atom to attract electrons and acquire a negative charge is known as __________.

Back

electronegativity.

Front

As you move down the periodic table, atoms get bigger. This is because __________.

Back

The atoms have more energy levels.

Front

The horizontal rows of elements in the periodic table are called __________.

Back

periods.

Front

The measure of an atom's ability to attract and hold onto electrons is called __________.

Back

electronegativity.

Front

Elements in the same group of the periodic table have __________.

Back

similar chemical properties.

Front

The atomic number of an element is determined by the number of __________ in its nucleus.

Back

protons.

Front

The overall charge of an atom is determined by the balance of __________ and __________.

Back

protons and electrons.