Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

How many valence electrons does a chlorine atom have?

Back

7

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How many protons are in a chlorine atom?

Back

17

Front

What subatomic particle is used to identify an element?

Back

Protons.

Front

What is the definition of an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom or ion.

Front

Which element has the lowest ionization energy?

Back

Cesium (Cs).

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

How many atoms are in the compound NaF?

Back

2 (1 sodium atom and 1 fluorine atom).