2(a)
Use the letters only written in the Periodic Table given below to answer the questions that follow:
| 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 its electrons arranged in four shells?
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(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 4th period.