Unit 5: Stage 8 8A

Atoms are made up of three kinds of particles ......., ......., and ......

• protons, nucleus, electrons

• protons, neutrons, electrons

• protons, nucleus, electrons

• elements, protons, electrons

Protons have a ......... electrical charge.

• negative

• positive

• neutral

• positive and negative

Neutrons have a ......... electrical charge.

• negative

• positive

• neutral

• positive and negative

There is an attraction between the positive and negative charges. It called .....

• atom attraction

• element attraction

• electrostatic attraction

• electrical attraction

Who discovered the electron? When did they discover it?

• Ernest Rutherford in 1909

• J.J Thompson in the late 1890s

• James Chadwick in 1932

• Ernest Rutherford in 1911

Who discovered the proton? When did they discover it?

• Ernest Rutherford in 1909

• J.J Thompson in the late 1890s

• James Chadwick in 1932

• Ernest Rutherford in 1911

Who discovered the nucleus? When did they discover it?

• Ernest Rutherford in 1909

• J.J Thompson in the late 1890s

• James Chadwick in 1932

• Ernest Rutherford in 1911

Who discovered the neutron? When did they discover it?

• Ernest Rutherford in 1909

• J.J Thompson in the late 1890s

• James Chadwick in 1932

• Ernest Rutherford in 1911

Which of these items are pure substance?

• gold, ammonia, seawater and hydrogen

• gold, iron, copper and salt

• soil, gold, hydrogen and seawater

• gold, iron, hydrogen and pottassium

Diamonds are made of ...... atoms.

• hydrogen

• carbon

• oxygen

• gold