Y9 Chapter 5 The Atoms Practice Test

The subatomic particle with a positive charge is the:

• neutron

• proton

• electron

• nucleus

It is possible for two atoms of a particular element to have:

• different masses and yet the same charge on their nuclei.

• different electrical charges but not different masses.

• the electrical charges on their nuclei different and different numbers of electrons in orbit to balance this.

Which of the following contain compounds only?

• water, iron and methane

• nickel, sodium and potassium

• carbon dioxide, magnesium oxide and sodium chloride

• hydrogen, oxygen and water

Which scientist proposed the plum pudding model of the atom?

• Democritus

• Ernest Rutherford

• J.J. Thomson

• James Chadwick

The word "atomos" means:

• atom

• invisible

• small

• divided

Most of an atom is made of:

• empty space

• electrons

• the nucleus

• protons and neutrons

Atoms and isotopes are electrically neutral because they have the same number of __________________________________.

These three carbon atoms are called ___________.

What is the difference between carbon-12 and carbon-13?

Calculate the numbers of neutrons in chlorine-35 and chlorine-37.