EASY
9th CBSE
IMPORTANT
Earn 100

Isotopes of an element are electrically neutral because they have same number of:

60% studentsanswered this correctly

Important Questions on Structure of Atom

MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 37
The element  Ca2040  forms Ca2+ ions. The electronic configuration of Ca2+ ion and its resemblance to noble gases is:
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 38
The electronic configuration of oxygen atom [ O816] and [O2- ] ion are respectively:
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 39
A charged particle has 16 protons, 18 electrons and 16 neutrons. The particle is:
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 40
A particle has 12 protons, 12 neutrons and 10 electrons. The particle is:
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 41
In the elements A (atomic number 3), B (atomic number 10), C (atomic number 12), D (atomic number 13) and E (atomic number 16), the metals are
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 42

An element whose nucleus does not contain any neutron is:

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 43
Which amongst the following have similar chemical properties?
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 44
Na1124, an isotope of sodium, is used: