Register
What is the mass number of an atom which contains 21 electrons,21 protons and 24 neutrons
190k views
8 votes
What is the mass number of an atom which contains 21 electrons,21 protons and 24 neutrons

User Jerebear
by
7.4k points

1 Answer

5 votes

Answer:

The atomic mass number is 45.

Hope this helps

User Ingo Kegel
by
7.6k points
← Prev Question Next Question →

No related questions found

Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Other Questions

Compare and contrast an electric generator and a battery??
How do you balance __H2SO4 + __B(OH)3 --> __B2(SO4)3 + __H2O
Can someone complete the chemical reactions, or write which one do not occur, and provide tehir types? *c2h4+h2o *c3h8 + hcl *c2h2+br2 *c4h10+br2 *c3h6+br2
What is the evidence of a chemical reaction when the fireworks go off
Which of the following statements does not describe a physical property of a piece of chalk A. Chalk is solid B.chalk can be broken into pieces C. Chalk is white D. Chalk will bubble in vinegar
Link Copied!