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tolong dijawab ya insya Allah dapet pahala
tolong dijawab ya insya Allah dapet pahala

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  • 5) Ba+2. proton= 56, neutron= 137-56=81, elektron = 56-2=54
    6) 37 Rb = 2, 8, 18, 9. ev = 9
    7) 37 Rb = 2, 8, 18, 9. ev = 9, P= 4, G=VII B
    19 K = 2, 8, 9. ev= 9, P=3, G= VII A
    55 Cs = 2, 8, 18, 18, 9. ev=9, P=5, G=VII B

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    maaf kalau salah.

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