Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


 The atomic masses of the elements are not whole number. atomic mass is roughly equal to the sum of the individual particle masses of an atom. the percent nature abundance of the elements ,that means that it is a weighted  average of all naturally occuring isotopes of that elements..

hope its help u

2 4 2
Atomic mass of an element is defined as the sum of the number of protons and neutrons in the nucleus of its atom. Example: atomic mass of calcium is 40(20+20).
1 5 1
Hope it helps you...
pls! Mark as best...
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts