Chemistry 1st Semester Review

Front

What is the electron configuration of Sodium (Na)?

Back

1s² 2s² 2p⁶ 3s¹

Front

What is the formula for calculating density?

Back

D = mass/volume

Front

What is the atomic number of phosphorus?

Back

15

Front

What is the mass of phosphorus-32?

Back

32

Front

What is a homogeneous mixture?

Back

A mixture in which the composition is uniform throughout.

Front

What are isotopes?

Back

Compounds which have the same number of protons but different numbers of neutrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements are chemically bonded, while a mixture is a combination of two or more substances that are not chemically bonded.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configurations, and recurring chemical properties.

Front

What is the definition of an ion?

Back

An atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.