Chemistry Semester Exam Fall 2024

Front

What is the basic unit of matter?

Back

The basic unit of matter is the atom.

Front

What is an element?

Back

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

Front

What does the periodic table represent?

Back

The periodic table organizes all known elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together.

Front

What is a subscript in a chemical formula?

Back

A subscript is a small number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

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 (it is neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

How many protons are in a sodium (Na) atom?

Back

A sodium (Na) atom has 11 protons.

Front

What is the atomic number of an element?

Back

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