Chemistry A Review for Trimester Exam (23-24)

Front

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

Back

atom

Front

What is a subatomic particle with a positive charge that is in the nucleus of an atom?

Back

proton

Front

What is a subatomic particle without an electric charge, located in the nucleus of an atom?

Back

neutron

Front

What is a subatomic particle with a negative charge? It is found in the electron cloud surrounding the nucleus.

Back

electron

Front

What is the center of an atom containing protons and neutrons?

Back

nucleus

Front

What is the number of protons in the nucleus of an atom that determines the chemical properties of an atom?

Back

atomic number

Front

What is the combined mass of all the protons and neutrons of an atom and is approximately equal to the number of protons and neutrons?

Back

atomic mass

Front

The number 16 for the atomic element sulfur is the

Back

atomic number

Front

How many protons does sulfur have?

Back

16

Front

How many electrons does sulfur have?

Back

16