HARD
7th Tamil Nadu Board
IMPORTANT
Earn 100

The atomic number and the mass number of an element are 26 and 56 respectively. Calculate the number of electrons, protons and neutrons in its atom. Draw the structure.

Important Questions on Atomic Structure

HARD
7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 4 - Atomic Structure>Evaluation>Q IX

What are nucleons? Why are they called so? Write the properties of the nucleons.

HARD
7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 4 - Atomic Structure>Evaluation>Q IX
Define valency. What is the valency of the element with atomic number 8? What is the compound by the element with hydrogen?
MEDIUM
7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 4 - Atomic Structure>Evaluation>Q X
An atom of an element has no electron, will that atom have any mass or not? Can an atom exist without electron? If so then give example.
HARD
7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 4 - Atomic Structure>Evaluation>Q X
Find what is common salt. Name the elements present in it. Write the formula of the common salt. What are the atomic number and mass number of elements? Write the ions in the compound?