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WorksheetsAtoms and the Periodic Table
Total questions: 25
Worksheet time: 17mins
Why is the overall charge of an atom neutral (0)?
They have the same number of protons and neutrons.
They have the same number of protons and electrons.
They have the same number of electrons and neutrons.
Use a periodic table to help you determine the element in the image. (Hint: Use the # of protons.)
lithium
oxygen
magnesium
carbon
How many protons does fluorine have?
19
1
9
10
How many neutrons does nitrogen have?
7
14
0
6
How many electrons does silicon have?
28
14
0
10
a unique number for each element that equals the number of protons in an atom of that element
element name
element symbol
atomic number
atomic mass
As you move left to right on a row or period what happens?
Atomic number increases by 1
Electrons decrease
Number of shells decrease
Nothing
What happens to the number of shells as you move down a group?
They decrease by 1
They increase by 1
Nothing
The first energy shell can hold ______ electrons.
2
8
18
Valence means......
inside
outside
full
Rows on the periodic table are called ___________.
Periods
Sentences
Fences
The columns in the periodic table are called ___________.
Towers
Herds
Groups
What group is the family found? These halides are very reactive and almost have full outer energy level/shell.
1
2
16
17
Sulfur is a...
metal
nonmetal
metalloid
