A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have? (3 points)
a
13
b
5
c
9
d
4
Answers
Answered by
3
Answer:
Beryllium has 5 neutrons because mass - electrons 9-4= 5
Answered by
4
Answer:
Option b
Explanation :
number of electrons =
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