Observe the given table and answer the following question :
Elements
А
B
C
D
E
Atomic number
11
4
2
7
19
Identify the two elements that belong to the same period and the two elements
that belong to the same group. Give reason for your conclusion.
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Answer:
11,19 same period,4,7 are the part of the same group
A,E BD
Explanation:
as in the periodic table all is clear!!
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