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WorksheetsModern periodic table Ck-12
Total questions: 10
Worksheet time: 8mins
How many protons do iron atoms have?
6
42
11
82
What element is in group 2, period 3?
(a)
What element is in group 17, period 3?
Fluorine
Magnesium
Chlorine
Nickel
In the modern periodic table, elements are arranged by the number of (a) in their nuclei.
What element is in group 17, period 2?
(a)
Each column of the modern periodic table is called (a)
There are __ groups of the periodic table.
12
7
2
18
What is the nature of new elements added to the periodic table in the last hundred years?
All were synthesized artificially.
All were discovered naturally.
Some were synthesized artificially and some were discovered.
No new elements have been added in that time.
True or false: horizontal rows are called groups.
True
False
True or false: The periodic table has changed very little since being developed by Mendeleev and Meyer.
False
True
