Question

Use the letters only written in the Periodic Table given below to answer the questions :
I II III IV V VI VII O
1 L
2 Q E G J Z M
3 R
4 T

(i) State the number of valence electrons in atom J.
(ii) Which element shown forms ions with a single negative charge?
(iii) Which metallic element is more reactive than R?
(iv) Which element has it’s electrons arranged in four shells?

July 25, 2024

Answer

(i) Atom J has 5 valence electrons as it belongs to the fifth group in the periodic table.

(ii) M forms ions with a single negative charge as it has 7 electrons in the valence shell and obtaining one more electron completes it’s octet.

(iii) Metal T is more reactive than R because elements at the bottom of the group are more reactive.

(iv) T has it’s electrons arranged in 4 shells as it belongs to 4^th period.

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