MEDIUM
9th Tamil Nadu Board
IMPORTANT
Earn 100

Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.

H11, n10, e0-1

Important Questions on Atomic Structure

HARD
9th Tamil Nadu Board
IMPORTANT
For an atom ‘X’, K, L and M shells are completely filled. How many electrons will be present in it?
HARD
9th Tamil Nadu Board
IMPORTANT
What is the same about the electron structures of Lithium, Sodium and Potassium?
HARD
9th Tamil Nadu Board
IMPORTANT
What is the same about the electron structures of Beryllium, Magnesium and Calcium?
HARD
9th Tamil Nadu Board
IMPORTANT
How was it shown that atom has empty space?
HARD
9th Tamil Nadu Board
IMPORTANT
Why do Cl1735 and Cl1737 have the same chemical properties? In what respect do these atoms differ?
HARD
9th Tamil Nadu Board
IMPORTANT
Draw the structure of oxygen and sulphur atoms.
MEDIUM
9th Tamil Nadu Board
IMPORTANT
Calculate the number of neutrons, protons and electrons of the element with atomic number 3 and mass number 7.
MEDIUM
9th Tamil Nadu Board
IMPORTANT
Calculate the number of neutrons, protons and electrons of the element with atomic number 92 and mass number 238 .