(Na2Cr2O7) all the numbers are bellow not over
Answer: The correct answer would be : True
I hope that this helps you !
Answer:
1341541345134514355143
Explanation:
THIS DUMB B~!TCH GAVE ME THIS ANSWER
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.
