HARD
10th CBSE
IMPORTANT
Earn 100

What are the defects in Mendeleev's periodic table? 

Important Questions on Periodic Classification of Elements

MEDIUM
10th CBSE
IMPORTANT
PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Check Your Progress>Q 5
Give an example of the element, which was discovered after Mendeleev's periodic table.
MEDIUM
10th CBSE
IMPORTANT
PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Check Your Progress>Q 1
Discuss how we predict the properties and characteristics of the elements from their position on the periodic table.
MEDIUM
10th CBSE
IMPORTANT
PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Check Your Progress>Q 2

Define the following terms:

Chemical formula, period, group, representative elements. 

EASY
10th CBSE
IMPORTANT
PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Check Your Progress>Q 2
Define period.
EASY
10th CBSE
IMPORTANT
PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Check Your Progress>Q 2
Define 'group' in the Periodic Table.
EASY
10th CBSE
IMPORTANT
PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Check Your Progress>Q 2
Define representative elements.
MEDIUM
10th CBSE
IMPORTANT
PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Check Your Progress>Q 3
Explain why elements have similar chemical properties.
MEDIUM
10th CBSE
IMPORTANT
PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Check Your Progress>Q 1
Two elements X and Y have atomic numbers 12 and 16 respectively. Write the electronic configuration for these elements. To which period of the modern periodic table do these two elements belong? What type of bond will be formed between them and Why?