Chem First Semester Review 24

Front

What does malleable mean?

Back

Able to be shaped.

Front

Subatomic particles with a positive charge are called?

Back

Protons.

Front

Which halogen is found in period 4?

Back

Bromine (Br).

Front

Which element has similar chemical properties as sodium but has 7 energy levels?

Back

Francium (Fr).

Front

What determines the identity of an element?

Back

Number of protons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number.

Front

What are isotopes?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of the valence electrons?

Back

They determine how an element reacts chemically with other elements.