Topic 8 Atoms and the Periodic Table

What is the dense center part of the atom called?

• electron

• proton

• neutron

• nucleus

• electron cloud

How do protons and electrons compare in a stable atom?

• There are always more protons.

• There are always less protons.

• There are always more electons

• Protons and Electrons are the same amount.

Tags

NGSS.MS-PS1-1

A stable atom has 47 electrons. How many protons does it have?

• 13

• 54

• 47

• 99

Tags

NGSS.MS-PS1-1

What element has an atomic number of 8?

• Boron

• Nitrogen

• Krypton

• Oxygen

Which part of the atom takes up the most volume (amount of space)?

• nucleus

• protons

• neutrons

• electron cloud

• electrons

Which part of the atom has the most mass?

• nucleus

• protons

• neutrons

• electron cloud

• electrons

A Gallium atom has 31 electrons. What level would the valence electrons be found on?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.HS-PS1-1

A magnesium atom has 12 electrons. What electron shell level would the valence electrons be found on? How many electron shells will Mg have?

• 1

• 2

• 3

• 4

• 5

Atoms are the building blocks of all matter?

• True

• False

Tags

NGSS.MS-PS1-1

Atoms and molecules are in motion some of the time.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1