Y10 Physics - Atomic Structure

The word atom comes from the word "atomos" which means

• invisible

• indivisible

• invincible

• visible

What are the particles that made up the atom?

• nucleus, protons, electrons

• neutrons, protons, electrons

• nucleus, electrons

• nucleus, protons

What is the charge of the nucleus?

• positive

• negative

• neutral

• both positive and negative

Almost the whole mass of an atom is concentrated in

• the number of electrons

• the number of protons

• the number of neutrons

• the nucleus

What is the relative mass of an electron?

• 1

• 1/2

• 1/200

• 1/2000

Rutherford's alpha scattering led to the discovery of the

• eletrons

• protons

• neutrons

• nucleus

In Geiger-Marsden experiment, most of the alpha particles that was fired towards the gold foil were undeflected. What does it say about the atom?

• The atom is neutral

• The atom is made up mostly of empty space

• The atom is does not interact to the alpha particles

• Alpha particles have the same charge as the nucleus

In the experiment of alpha scattering on the diagram, why was alpha particle A got deflected?

• The alpha particle was attracted by the electron nearby

• The alpha particle was repelled by the nucleus

• It was repelled by another alpha particle

• It was repelled by the neutron

In the experiment of alpha scattering on the diagram, alpha particle B was back-scattered or bounced off. Why?

• It was heading almost directly towards the nucleus and the force of repulsion was strong.

• It was interacting with another alpha particle

• It was repelled by the nucleus

• It was repelled by the neutron

What is the charge of an alpha particle?

• 2

• +2

• -2

• +4