EASY
10th Manipur Board
IMPORTANT
Earn 100

Name two elements having four electrons in their outermost shells.

Important Questions on Periodic Classification of Elements

EASY
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these>Q 6
Name three elements with completely filled shells.
EASY
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these>Q 7
Fluorine, chlorine and bromine belong to group 17 of the periodic table. What similarity is there in the atoms of these elements ?
EASY
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these>Q 8
By considering their position in the periodic table, which one of the following elements is expected to have maximum metallic character? 
In, Sn, Sb, Te, I.
MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these>Q 11
Why are non-metals found on the right-hand side of the periodic table towards the top?
MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>EXERCISES>Q 1
Why is there a need to classify the elements? What difficulties are likely to arise if the classification is not made?
EASY
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>EXERCISES>Q 2
Name the period and group to which the element with atomic number 15 belongs.
MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>EXERCISES>Q 3
State one reason for keeping boron and aluminium in the same group of the periodic table.
MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>EXERCISES>Q 4
Write the electronic configurations of the elements Na, Al, Ca, O and Si and justify their positions in the periodic table.