Chemistry - week 1

The particles in the nucleus of an atom are

• protons and electrons

• neutrons and protons

• electrons, protons and neutrons

The atomic particle with a positive charge is the

• proton

• electron

• neutron

Which particle orbits the nucleus of an atom?

• protons

• neutrons

• electrons

Which part of this atom is the electron?

• a

• b

• c

The number of electrons in a neutral atom is usually the same as

• the number of neutrons

• the atomic number

• the number of protons

• the atomic number and the number of protons

Which atom would have 12 electroms?

• Carbon

• Magnesium

• both

How many protons are in the nucleus of this atom?

• 9

• 19

• 10

The atomic number of this atom is

• 5

• 3

• 7

What is the atomic mass of an atom of this element?

• 20

• 60

• 40

How many neutrons does an atom of this element have?

• 17

• 35

• 18