Atomic Structure

Which particle contributes the negative charge to the atom?

• proton
• electron
• neutron
• nucleus

Which particle does not contribute mass to the atom?

• Proton
• Neutron
• Electron
• Nucleus

What is the standard unit of mass at the atomic level?

• centimeters
• millimeters
• amu
• milligrams

Most of the mass in an atom is made up of _____________________?

• protons and electrons
• protons and neutrons
• neutrons and electrons
• electrons and quarks

What is the electrical charge of a proton?

• 1+
• 1-
• neutral
• 2-

What is atomic number?

• Number of protons in an atoms 
• Number of neutrons in an atom
• Mass of an atom
• Charge on an atom

What electrical charge does an electron have?

• +1
• 0
• -1
• +2

What subatomic particles have the SAME mass?

• protons and neutrons
• protons and electrons
• neutrons and electrons
• protons, neutrons & electrons

How many protons does an aluminium atom have? (Use your periodic table!)

• 27
• 14
• 40
• 13

How many neutrons does a Boron atom have? (Use the image to help you)

• 5
• 11
• 6
• 16