Atoms and Periodic Table

An element has an atomic number of 20. This means it has

• 20 protons

• 20 atoms in it

• 20 neutrons

• atomic mass of 20

Protons and Electrons

• have same mass

• have opposite charges

• are both found in the nuclues

• are added together to find the atomic mass

What is the atomic number of the atom shown?

• 13

• 27

• 14

• 1

Tags

NGSS.MS-PS1-1

_________ are the smallest unit of an element that still has all the properties of that element

• Electrons

• Atoms

• Protons

• Neutrons

Tags

NGSS.MS-PS1-1

What name is Group 1 also known by?

• Nobel gases

• Alkali metals

• Transition metals

• Halogen gases

What does AMU stand for?

Tags

NGSS.HS-PS1-8

Part A in the diagram shown is called....

• Electron

• Neutron

• Proton

• Nucleus

Tags

NGSS.MS-PS1-1

Part B shown in the diagram is known as.....

• Electron

• Proton

• Neutron

• Nucleus

Tags

NGSS.MS-PS1-1

Part C shown in the diagram is called .....

• Electron

• Proton

• Neutron

• Nucleus

Tags

NGSS.MS-PS1-1

How many electrons can fit on the first shell?

• 2

• 8

• 6

• 12

Tags

NGSS.MS-PS1-1