P7 Atoms Retrieval

The nucleus contains (choose 2)

• Atoms

• Neutrons

• Protons

• Electrons

Electrons can be found: (pick the BEST answer)

• Inside the nucleus

• Outside the nucleus

• Orbitting around the nucleus

• Orbitting in fixed shells around the nucleus

The Plum Pudding Model of the atom can be summarised as:

• A nucleus with electrons orbitting around it.

• A sphere of positive charge with negative electrons embedded in it.

• A sphere of negative charge with protons embedded in it.

• A neutral ball of matter with protons and electrons embedded in it.

The charge on a proton, a neutron and an electron?

• 1, 0, -1

• -1, 0, 1

• 1, 1, -1

• 1, -1, 0

Why do atoms have no overall charge?

• Because they are neutral

• Because they have equal numbers of protons and neutrons

• Because they have equal numbers of protons and electrons

• Because they have neutrons

What is the radius of an atom, in metres?

• 1x10^-5

• 1x10^-10

• 1x10^-15

• 1x10^-20

What is the size of a nucleus, in metres?

• 1x10^-5

• 1x10^-10

• 1x10^-15

• 1x10^-20

How does an electron move UP an energy level?

• Emit a particular amount of electromagnetic radiation

• Absorb a particular amount of electromagnetic radiation

Ionisation is a process which...?

• Adds or removes electrons from an atom

• Adds electrons to an atom

• Removes electrons from an atom

• Charges up the atoms in a substance

A positive ion is formed when...?

• An atom loses an electron

• An atom gains an electron

• An atom loses a proton

• An atom gains a proton