MEDIUM
10th CBSE
IMPORTANT
Earn 100

The properties of few elements are given below:

Element A B C
Melting point 100°C 120°C 213°C
Atomic size 120 pm 131 pm 136 pm

Answer the given question with suitable reason: Should the metallic character decrease or increase from A to C?

Important Questions on Periodic Classification of Elements (The Periodic Table)

MEDIUM
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 5 - Periodic Classification of Elements (The Periodic Table)>SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)>Q 27

The properties of few elements are given below:

Element A B C
Melting point 100°C 120°C 213°C
Atomic size 120 pm 131 pm 136 pm

Answer the given question with suitable reason: Will the valencies of all the elements will be same or different?

HARD
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 5 - Periodic Classification of Elements (The Periodic Table)>SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)>Q 28

Complete the following table of elements of period 2 of the periodic table.

Group 1 2 13 14 15 16 17 18
Element Li __ B C __ __ __ Ne
Atomic number 3 4 5 6 7 __ 9 10
Name Lithium Beryllium __ __ __ Oxygen Fluorine Neon
HARD
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 5 - Periodic Classification of Elements (The Periodic Table)>SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)>Q 29
An element X of group 15 and period 2 exists as diatomic molecule. It combines with hydrogen and forms ammonia in the presence of a suitable catalyst. Identify the element X.
MEDIUM
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 5 - Periodic Classification of Elements (The Periodic Table)>SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)>Q 29
An element X of group 15 and period 2 exists as diatomic molecule. It combines with hydrogen and forms ammonia in the presence of a suitable catalyst. Write the electronic configuration of X and count the number of valence electrons.
MEDIUM
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 5 - Periodic Classification of Elements (The Periodic Table)>SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)>Q 29
An element X of group 15 and period 2 exists as diatomic molecule. It combines with hydrogen and forms ammonia in the presence of a suitable catalyst. Draw the electron dot structure of the diatomic molecule of X and name the type of bond formed.
EASY
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 5 - Periodic Classification of Elements (The Periodic Table)>SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)>Q 29
An element X of group 15 and period 2 exists as diatomic molecule. It combines with hydrogen and forms ammonia in the presence of a suitable catalyst. Draw the electron dot structure of ammonia.
MEDIUM
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 5 - Periodic Classification of Elements (The Periodic Table)>SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)>Q 29
An element X of group 15 and period 2 exists as diatomic molecule. It combines with hydrogen and forms ammonia in the presence of a suitable catalyst. What is the total number of bonds in a molecule of ammonia?
EASY
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 5 - Periodic Classification of Elements (The Periodic Table)>SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE on CCE)>Q 30
An element Y exists as yellow solid, it shows catenation and allotropy. The element forms two types of oxides which are also the products of thermal decomposition of ferrous sulphates. These gases are the major causes of air pollution. Write the balanced chemical equation for the thermal decomposition of ferrous sulphate.