(A) : According to Mendeleeff, periodic properties of elements is a function of their atomic masses.
(R) : Atomic number is equal to number of protons

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.

An Intiative by Sri Chaitanya

Both A and R are true but R is not the
correct explanation of A

A is false but R is true

A is true but R is false

Both A and R are true and R is the correct
explanation

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

According to Mendeleev, the physical and chemical properties of elements are periodic functions of their atomic weights (atomic masses).

The atomic number is equal to the number of protons present in the atom Additionally, it is equivalent to the neutral atom's total amount of electrons.

Therefore Option D is the correct answer

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test