3. II 2-3, Wal Wu Deu
6. Fill in the missing information in the following table (AS)
Number of Number
Name
Symbol
cons
Electron
Atomic
Mass
INumber (Z) Number (A) Neutrons
I 8 I 16
7
7
Oxygen
160
34 S.
16
9
Beryllium
12
24
12
25
Answers
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Answer: iron
Explanation:
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