Question

up or
as
tallic
Omic
19. (i) State the number of elements in Period 1, Period
2, and Period 3 of the periodic table. Name
them.
(ii) What is the common feature of the electronic
configuration of the elements at the end of Period
2 and Period 3 ?
(iii) If an element is in Group 17, it is likely to be
[metallic/non-metallic) in character, while
with one electron in its outermost energy level
(shell), then it is likely to be [metallic/non-
metallic).
(iv) In Period 3, the most metallic element is
(sodium/magnesium/aluminium).
correct
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Answer 1

Explanation:

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