Physical Science Exam Review

Front

Which subatomic particle has the least mass?

Back

Electron

Front

What trend is observed in the periodic table when moving from left to right?

Back

The elements change from metals to nonmetals.

Front

What is the difference between Na+ ions and atomic Na?

Back

Atomic sodium has one more electron.

Front

What does it mean if an element tends to lose 2 electrons?

Back

It tends to become a 2+ ion.

Front

What does the atomic number of an element indicate?

Back

It indicates the number of protons in the atom.

Front

What is the charge of a proton?

Back

Positive (+)

Front

What is the charge of an electron?

Back

Negative (-)

Front

What is the charge of a neutron?

Back

Neutral (0)

Front

What is an ion?

Back

An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their properties and atomic structure.