Unit 1, Practice 1 - Counting Protons, Neutrons, and Electrons

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How do you determine the number of neutrons in an atom?

Back

The number of neutrons can be found by subtracting the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number).

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

Where are protons located in an atom?

Back

Protons are located in the nucleus of an atom.

Front

Where are electrons located in an atom?

Back

Electrons are located in the electron cloud surrounding the nucleus.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

How many protons are in a Chlorine atom?

Back

Chlorine has 17 protons.

Front

How many electrons are in a neutral Sulfur atom?

Back

A neutral Sulfur atom has 16 electrons.

Front

How many neutrons are in a Magnesium atom?

Back

Magnesium has 12 neutrons.