Year 9 Chemistry- Atomic Structure

Write your full name and class.

The total number of protons and neutrons in an atom is called the...

• Atomic number
• Proton number
• Mass number
• Weight number

Tags

NGSS.HS-PS1-8

What mass does a neutron have?

• 1
• 0
• -1
• +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

Which subatomic particles are found in the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Neutrons and Electrons
• Protons, Neutrons and Electrons

Tags

NGSS.MS-PS1-1

How many protons does an aluminium atom have? (Use the image to help you)

• 27
• 14
• 40
• 13

Tags

NGSS.MS-PS1-1

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

• 23
• 11
• 12
• 34

Tags

NGSS.MS-PS1-1

Complete the missing label on the diagram.

• Neutron
• Centre
• Nucleus
• Sub atomic particle

Tags

NGSS.MS-PS1-1

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

The _________ of an element equals the number of protons in an atom of that element

• mass number
• atomic weight
• atomic number
• isotopes