1G2 8.2 Proton, Neutron, Electron

Which of the following is the smallest?

• a bacteria

• an atom

• a red blood cell

• a dust particle

Which sub-atomic particle moves around the nucleus?

Which subatomic particle has a charge of +1?

What is the net charge of an atom?

• +1

• -1

• 0

Which subatomic particle has the smallest relative mass?

• proton

• electron

• neutron

Which of the following particle(s) is/are an atom(s)? [Select all possible options]

• A = 1 proton, 2 electrons

• B = 1 proton, 1 electron

• C = 2 protons, 2 electrons

• D = 2 protons, 3 electrons

Which of the following statement(s) is/are correct?
[Select all possible options]

• An atom is always electrically neutral

• In an atom, the number of protons is always equal to the number of electrons

• The mass number refers the total number of protons and neutrons

• Electrons are found in the nucleus

How many protons does an aluminum atom have?

• 13

• 14

• 26

• 27

How many neutrons does a neon atom has?

• 10

• 11

• 20

• 21

What is the atomic number of sulfur?

• 16

• 17

• 18

• 19