S1 Final Exam Review

Front

The most reactive metals are found in Group _________.

Back

1

Front

Electrons have a positive charge.

Back

False

Front

Which particle has the lowest mass?

Back

Electron.

Front

Group 17 elements are called halogens.

Back

True

Front

Identify which of the following is NOT a pure substance: Water, Milk, Oxygen, Carbon dioxide.

Back

Milk.

Front

What is the charge of an electron?

Back

Negative.

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, Electrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus.

Front

What is a pure substance?

Back

A material with a constant composition and distinct chemical properties.

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.