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Jumat, 19 November 2010

Tanda Atom

massa atom nomor atomX

RUMUS
  • Untuk Atom Netral
1.      Nomor atom = Jumlah proton = Jumlah elektron
2.      Jumlah neutron = Massa atom - Nomor atom
3.      Massa atom = Jumlah proton + Jumlah neutron

Contoh : 2713Al => Proton               : 13
Elektron           : 13
Neutron            : 27 - 13 = 14

massa atom nomor atomXmuatan +

RUMUS
·        Untuk Ion Positif
1.      Nomor atom = Jumlah proton = Jumlah elektron
2.      Jumlah neutron = Massa atom - Nomor atom
3.      Massa atom = Jumlah proton + Jumlah neutron
4.      Jumlah elektron = Nomor atom - Muatan

Contoh : 2713Al 3+ =>   Proton         : 13
Elektron     : 13 - 3 = 10
Neutron      : 27 - 13 = 14


massa atom nomor atomXmuatan -

RUMUS
·        Untuk Ion Negatif
1.      Nomor atom = Jumlah proton = Jumlah elektron
2.      Jumlah neutron = Massa atom - Nomor atom
3.      Massa atom = Jumlah proton + Jumlah neutron
4.      Jumlah elektron = Nomor atom + Muatan

Contoh : 3216S 2 - => Proton : 16
Elektron        : 16 + 2 = 18
Neutron         : 32 - 16 = 16

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