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Horizontal rows are called?
Periods
Vertical columns are called?
Groups
Elements in the same ___ have similar properties.
Group
Elements that belong to the same family have the same number of ___ electrons.
Valence
Which element in Period 2 has the least mass?
Lithium
Which element in Period 2 has the most mass?
Neon
What group/family does Sulfur belong to?
16
What group/family does Argon belong to?
18
What group/family does Chlorine belong to?
16
What group/family does Sodium belong to?
1
What group/family does Silicon belong to?
14
What group/family does Phosphorus belong to?
15
What is the atomic number of Iron.
26
To which Period does Iron belong to?
4
To which Group does Iron belong to?
8
Name the elements that have properties like Iron.
Cobalt, nickel, zinc, copper.