Two elements X and Y have atomic number $12$ and $17$ respectively.
(i) Write the electronic configuration of both.
(ii) Which type of bond will they form?
(iii) Write the formula of the compound formed by their combination (in terms of X and Y).

Important Questions on Periodic Classification of Elements

HARD

10th CBSE

IMPORTANT

SUPER SIMPLIFIED SCIENCE CHEMISTRY CLASS X>Chapter 5 - Periodic Classification of Elements>Test Your Knowledge>Q 28

(a) Name metals among first five elements of the Modern Periodic Table.
(b) Write their chemical symbols.
(c) Write the formula of their oxides.

HARD

10th CBSE

IMPORTANT

SUPER SIMPLIFIED SCIENCE CHEMISTRY CLASS X>Chapter 5 - Periodic Classification of Elements>Test Your Knowledge>Q 29

An element 'X' belongs to

3^{rd}

period and group 16 of the Modern Periodic Table.
(a) Identify the element.
(b) Is it a metal or non-metal?
(c) What is the valency of the element?
(d) Write the formulae of its compound with hydrogen.

HARD

10th CBSE

IMPORTANT

SUPER SIMPLIFIED SCIENCE CHEMISTRY CLASS X>Chapter 5 - Periodic Classification of Elements>Test Your Knowledge>Q 30

Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of the elements vary on moving down a vertical column? How does the size of the atomic radius vary on moving from left to right in a horizontal row? Give reason in support of your answer in the above two cases.