WorksheetsPeriodic Table Trends Valence Electrons
Total questions: 20
Worksheet time: 27mins
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
Which elements have the most similar chemical properties?
boron and carbon
oxygen and sulfur
aluminum and bromine
argon and silicon
The largest number of valence electrons (and the number that creates stability) is:
1
2
8
18
What groups are the most reactive metals?
2 and 3
1 and 18
1 and 2
16 and 17
What group has the most reactive non metals?
1
17
2
18
Why are halogens so reactive?
They want to get rid of their only valance electron
They only need one more electron
They are non reactive, they have a full shell
How many valence electrons does carbon have?
4
5
6
7
USE THE PERIODIC TABLE
Find the element that has 3 Valence Electrons and 2 energy levels.
Magnesium - Mg
Lithium - Li
Aluminum - Al
Boron - B
USE THE PERIODIC TABLE
Find the element that has 5 Valence Electrons and 4 energy levels.
Arsenic - As
Selenium - Se
Calcium - Ca
Vanadium - V
Is this the correct Lewis Dot Structure for Boron?
Yes
No, missing electrons
No, too many electrons
No, dots are in wrong place.
Is this correct way to draw the Lewis Dot Structure for Carbon?
Yes
No, too many electrons
No, not enough electrons
No, dots are in wrong places
This could be the dot diagram of
Mg
Cl
C
O
How many valence electrons should Magnesium have in its Lewis dot model?
1
2
3
4
This is a correct dot diagram for neon (Ne)
true
false
