PDF chapter test TRY NOW
Write a short answer to the following questions in a few sentences:
1. “Hydrogen occupies a unique position in the Modern Periodic Table”. Justify the statement.
Hydrogen resembles group (Alkali metals) and group (Halogens); therefore, it occupies a unique position in the Modern Periodic Table.
2. Compare the radii of two species X and Y. Give reasons for your answer.
(a). X has 12 protons and 12 electrons
(b). Y has 12 protons and 10 electrons
(a). X has 12 protons and 12 electrons
(b). Y has 12 protons and 10 electrons
‘X’ has 12 protons and 12 electrons. It has a bigger atomic size as compared to ‘Y’ has 12 protons and 10 electrons because the effective nuclear charge is less in X than Y. Secondly, the number of shells is more in ‘X’ than ‘Y’.
Therefore,
(a). ‘X’ has a bigger .
(b). Y has a as compared to ‘X’.
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