Basic Chemistry Test for Honors Biology

Front

What is the atomic number of an element?

Back

The atomic number is the total number of protons in the nucleus of an atom.

Front

How many protons, neutrons, and electrons are in a carbon-14 atom?

Back

A carbon-14 atom has 6 protons, 8 neutrons, and 6 electrons.

Front

What element is commonly added to water and toothpaste to prevent tooth decay?

Back

Fluoride.

Front

What is the role of iron in the human body?

Back

Iron is important for forming hemoglobin and red blood cells, giving blood its red color.

Front

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

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the significance of the atomic mass of an element?

Back

Atomic mass is the weighted average mass of an element's isotopes, reflecting the number of protons and neutrons.

Front

What is a chemical element?

Back

A chemical element is a pure substance that cannot be broken down into simpler substances by chemical means.