Lesson 1-4 Matter, Atoms, Elements, & PT

Front

How many elements are there on the Periodic Table?

Back

There are 118 elements on the Periodic Table.

Front

In a neutral atom, which subatomic particles are always equal?

Back

In a neutral atom, the number of protons is always equal to the number of electrons.

Front

What are the horizontal rows in the Periodic Table called?

Back

The horizontal rows in the Periodic Table are called periods.

Front

Which element is a halogen?

Back

Fluorine is a halogen.

Front

What does a chemical symbol always start with?

Back

A chemical symbol always starts with a capital letter.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are the three main subatomic particles?

Back

The three main subatomic particles are protons, neutrons, and electrons.

Front

What charge do protons have?

Back

Protons have a positive charge.

Front

What charge do electrons have?

Back

Electrons have a negative charge.

Front

What charge do neutrons have?

Back

Neutrons have no charge (they are neutral).