Chemistry review

Which subatomic particle has a negative charge?

• Proton

• Electron

• Neutron

Which subatomic particles are located in the atoms nucleus

• Protons

• Neutrons

• Protons and Neutrons

• Neutrons and Electrons

What does atomic number represent?

• Number of neutrons

• Number of protons

• Number of protons and electrons

• Number of neutrons and electrons

How many electrons can be held in the third shell of a Bohr diagram?

• 2

• 8

• 10

If an element is in Group 2, how many valence electrons will it have?

• 1

• 2

• 8

• 6

What does a Lewis Dot diagram show?

• All the electrons in an atom

• The type of ions

• Only the valence electrons in an atom

• What family it is in

What is the number of valence electrons the same as?

• The group/family number

• Atomic number

• Atomic mass

• Number of protons

Which of the following is a clue for a physical change?

• Breaking

• Heat

• Odour

• Bubbles of gas

Why is a firefly a chemical change

• Heat is given off

• An odour is produced

• Light is given off

• Cannot be reversed

Tags

NGSS.MS-PS1-5

How many atoms of H are there in H₂O?

• 1

• 2

• 3

• 5

Tags

NGSS.MS-PS1-1