SCIENCE 9-Second Quarter Summative Test

It refers to as the electron farthest from the nucleus of the atom.

• Valence electron

• Proton

• Neutron

• Molecules

The valence electron ___________ with the other valence electron from other atoms.

• Repel

• Detach

• React

• Overlap

How many valence electrons are in Group 2A?

• 4

• 1

• 6

• 2

How many valence electrons are in Group 1A?

• 1

• 3

• 4

• 7

How many valence electrons are in Group V?

• 1

• 5

• 2

• 6

How many valence electrons are in Group VIIA?

• 5

• 6

• 7

• 8

Which group has the greatest number of valence electrons?

• 1

• 18

• 14

• 16

When trying to identify an unknown element, scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?

• The total number of neutrons in the unknown element.

• The number of protons in the nucleus of the unknown element

• The total number of particles in the nucleus of the unknown element

• The number of valence electrons in the unknown element.

How many valence electrons are in an atom of P?

• 4

• 2

• 5

• 3

How many valence electrons does Boron have?

• 2

• 3

• 8

• 13