Periodic Table & Valence Electrons _ Practice Quiz 1

Question 1

The region outside the nucleus where electrons are found is called

Accepted Answer

energy levels, electron shells

Question 2

The innermost energy level of any atom can hold up to _____ electrons

Accepted Answer

two

Question 3

The 5th energy level can hold a maximum of ______ electrons

Accepted Answer

18

Question 4

The 3rd energy level can hold a maximum of ______ electrons

Accepted Answer

8

Question 5

This could be the dot diagram of

Accepted Answer

Cesium (Cs)

Question 6

What is THE SAME for Lithium, Beryllium and Boron

Accepted Answer

same number of electron shells

Question 7

Which is THE SAME for Magnesium and Beryllium ?

Accepted Answer

number of valence electrons

Question 8

Halogens lack _____ valence electron/s to make a full shell.

Accepted Answer

one

Question 9

The 2nd energy level of any atom can hold _____ electrons.

Accepted Answer

eight

Question 10

Which of these elements has 5 valence electrons?

Accepted Answer

Phosphorus (P)

Question 11

If an atom has 20 protons, how many valence electrons will it have?

Accepted Answer

two

Question 12

Noble gases have their outermost energy level _________ of electrons.

Accepted Answer

full

Question 13

This is a correct dot diagram for oxygen (O)

Accepted Answer

True

Question 14

If an atom has 6 protons, how many valence electrons will it have?

Accepted Answer

four

Question 15

This is the correct dot diagram for nitrogen (N)

Accepted Answer

False

Question 16

This is a correct dot diagram for fluorine (F)

Accepted Answer

True

Question 17

A valence electron or electrons exist in the ______ energy level.

Accepted Answer

outermost

Question 18

Elements in the same groups of the periodic table always have the same # of _______

Accepted Answer

valence electrons

Question 19

If an atom has 4 protons, how many valence electrons will it have?

Accepted Answer

two

Question 20

Which of these elements has 3 valence electrons?

Accepted Answer

Gallium (Ga)

Question 21

This could be the dot diagram of

Accepted Answer

Iodine (I)

Questions 21