Unit 3: Atomic Structure

The atomic number indicates...

• the number of protons and neutrons an element has
• the number of protons an element has
• the average mass of all the isotopes of an element
• the number of electrons on the outer shell

The atomic mass indicates...

• the number of protons and neutrons an element has
• the number of protons an element has
• the average mass of all the isotopes of an element
• the number of electrons on the outer shell

The mass number of an element indicates...

• the number of protons and neutrons an element has
• the number of protons an element has
• the average mass of all the isotopes of an element
• the number of electrons on the outer shell

What is the atomic number of aluminum

• 13
• 26.98
• 27
• 3

Isotopes of the same element...

• have different number of neutrons
• have different number of protons
• have the same mass
• none of these are true

This particle is found in the nucleus and has no charge

• Neutron
• Proton
• Electron

This particle is found in the nucleus and has a positive charge

• Electron
• Proton
• Neutron

This is a negatively charged particle found outside the nucleus

• Electron
• Proton
• Neutron

This contains most of the mass of an atom

• Electron Cloud
• Nucleus
• Electron

This is the simplest of all atoms and contains only one proton and one electron

• Oxygen
• Hydrogen
• Water