10 points
1. An atom of a certain element has the atomic number 89 and the mass
of 227 amu....
Chemistry, 20.04.2021 17:10 blondieb1722
10 points
1. An atom of a certain element has the atomic number 89 and the mass
of 227 amu. How man neutrons does the atom have? *
a. 89
b. 227
C. 138
O d. 316
2. An atom of Be has four protons, five neutrons and four electrons. What 10 points
is the mas of Be? *
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