Properties of Atoms Test Review

Who formed the first periodic table?

• Mendeleev
• Moseley

• Dalton

• Bohr

Which of the following atomic particles is positively charged?

• Neutron

• Electron

• Proton

• Negaron

The ____ of an atom is the number of neutrons plus protons.

• mass number
• atomic number

• protons

• neutrons

The atomic number of manganese is 25; its mass number is 55. How many neutrons does an atom of manganese have in its nucleus?

• 25

• 55

• 30

• 60

The number of which type of particle determines the identity of an element?

• Electrons

• Neutrons

• Protons

• Photons

What subatomic particle is electrically neutral (no charge)?

• Proton

• Neutron

• Electron

• Ion

What is the mass number of an atom if it has 11 protons, 12 neutrons, and 11 electrons?

• 22

• 34

• 11

• 23

What's a valence electron?

• electrons in the second energy level

• the atomic number

• electrons in the outermost energy level

• electrons in the first level

How many electrons can go in the First energy level of a Bohr model?

• 2

• 8

• 18

• 32

How many electrons can go in the Second energy level of a Bohr model?

• 2

• 8

• 18

• 32