Question

how to find group and period of atomic number of 42
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Answer 1

Answer:

Come down to the next period ,i.e period 3. We need to reach four blocks to the right to get to group 4. Going each block to the right will increase the atomic number by 1. Therefore, going 4 blocks to the right will give us the atomic number = 10+4= 14.

Answer 2

Come down to the next period ,i.e period 3. We need to reach four blocks to the right to get to group 4. Going each block to the right will increase the atomic number by 1. Therefore, going 4 blocks to the right will give us the atomic number = 10+4= 14.