• Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • NCERT Solutions
    • NCERT Books Free Download
  • TS Grewal
    • TS Grewal Class 12 Accountancy Solutions
    • TS Grewal Class 11 Accountancy Solutions
  • CBSE Sample Papers
  • NCERT Exemplar Problems
  • English Grammar
    • Wordfeud Cheat
  • MCQ Questions

CBSE Tuts

CBSE Maths notes, CBSE physics notes, CBSE chemistry notes

How many neutrons does it have?

An atom of aluminum has an atomic number of 13 and a mass number of 27. How many neutrons does it have?

Answer:
14 neutrons

Explanation:
The mass number is the total number of protons and neutrons in a nucleus. The atomic number is the number of protons in the nucleus.

With this information it is an easy question:
mass number (p + n) – atomic number (p) = neutrons (n)
\(\rightarrow 27-13=14\) neutrons!

Primary Sidebar

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins CBSE Sample Papers

Recent Posts

  • NEET Physics Chapter Wise Mock Test – General properties of matter
  • ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 6 Factorization MCQS
  • Division of a Polynomial by a Monomial
  • Multiplication-Decimal Numbers
  • Proper, Improper and Mixed fractions
  • NCERT Exemplar Class 7 Maths Rational Numbers
  • Fractions
  • NCERT Exemplar Class 10 Maths Solutions Chapter 13 Statistics and Probability
  • NCERT Exemplar Class 10 Maths Solutions Chapter 12 Surface Areas and Volumes
  • NCERT Exemplar Class 7 Maths Triangles
  • NCERT Exemplar Class 7 Maths Comparing Quantities
  • NCERT Exemplar Class 10 Maths Solutions Chapter 11 Area Related To Circles
  • NCERT Exemplar Class 7 Maths Lines And Angles
  • NCERT Exemplar Class 7 Maths Data Handling
  • NCERT Exemplar Class 10 Maths Solutions Chapter 10 Constructions

Footer

Maths NCERT Solutions

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 11 Maths
NCERT Solutions for Class 10 Maths
NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 8 Maths
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 6 Maths

SCIENCE NCERT SOLUTIONS

NCERT Solutions for Class 12 Physics
NCERT Solutions for Class 12 Chemistry
NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 11 Chemistry
NCERT Solutions for Class 10 Science
NCERT Solutions for Class 9 Science
NCERT Solutions for Class 7 Science
MCQ Questions NCERT Solutions
CBSE Sample Papers
cbse ncert
NCERT Exemplar Solutions LCM and GCF Calculator
TS Grewal Accountancy Class 12 Solutions
TS Grewal Accountancy Class 11 Solutions