1st semester chemistry REVIEW

Front

What is an ion?

Back

An ion is formed when an atom gains or loses electrons.

Front

What charge do protons have?

Back

Protons have a positive charge and are located in the nucleus.

Front

Which of the following is a halogen: Be, B, Br, Kr?

Back

Br (Bromine) is a halogen.

Front

What is the atomic number of Beryllium?

Back

Beryllium has an atomic number of 4.

Front

What is the mass number of an atom with 3 protons and 4 neutrons?

Back

The mass number is 7.

Front

What is the charge of an electron?

Back

Electrons have a negative charge.

Front

Where are neutrons located in an atom?

Back

Neutrons are located in the nucleus.

Front

What is the difference between atomic number and mass number?

Back

Atomic number is the number of protons, while mass number is the total number of protons and neutrons.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number.