Question
An element X has atomic number 17 and mass number 37. Its number of neutrons and valency respectively are:
This question was previously asked in
HTET 2025 Level 1 PRT Question Paper (5-Jul-2026)
The correct answer is
20, 1
Number of neutrons = mass number - atomic number = 37 - 17 = 20. Chlorine (atomic number 17) has 7 valence electrons and typically needs to gain just 1 electron to complete its octet, giving it a valency of 1.
Was this answer helpful?
Similar Questions
In an atom, maximum number of electrons in a shell is given by:
Important Questions from Structure of Atom
Identify the element having zero valency
The atomic number of an element is 8. How many electrons will it gain to form a compound with sodium?
An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
What is the atomic number of nitrogen?
What are isobars?
Need Expert Advice?
Test Series
Teaching
HTET TGT Physical Education Mock Test Series
83 Tests 2 Tests Free
889 Attempts
4.2(9)
English, Hindi
More Questions from HTET
