Three elements 'X', 'Y' and 'Z' have atomic numbers 7, 8 and 9 respectively. |
(a) State their positions (Group number and period number both) in the Modern Periodic Table. |
(b) Arrange these elements in the decreasing order of their atomic radii. |
(c) Write the formula of the compound formed when 'X' combines with 'Z'. |
Answer:
(a)
X (7) = 2, 5 Group 15, Period 2
Y (8) = 2, 6 Group 16, Period 2
Z (a) = 2, 7 Group 17, Period 2.
(b)
\[X>Y>Z\]
(c)
\[X{{Y}_{3}}\]
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