The missing parts in the table is given below
- Bi. Nucleon number => 23
- Bii. Symbol => Na⁺
- Ci. Number of electrons => 10
- Cii. Nucleon number => 16
- Di. Number of protons => 13
- Dii. Number of neutrons => 15
Composition of atom
An atom is composed of a centrally placed nucleus (containing protons and neutrons) and a cloud of electrons revolving round it.
Relatioships
Mass number (number of nucleon) = Proton + Neutron
Charge = Proton – Electron
How to determine the missing part of particle B
i. Determination of the nucleon number
- Proton = 11
- Neutron = 12
- Nucleon number =?
Nucleon number = Proton + Neutron
Nucleon number = 11 + 12
Nucleon number = 12
ii. Determination of the symbol
We'll begin by determining the charge of the particle. This is illustrated below:
- Proton = 11
- Electron = 10
- Charge = ?
Charge = Proton – Electron
Charge = 11 – 10
Charge = +1
From the periodic table, the element with proton number of 11 is sodium, Na. Since the particle B has a charge of +1, the symbol of particle of B is Na⁺
How to determine the missing part of particle C
i. Determination of the number of electrons
- Proton = 8
- Charge = –2
- Electron = ?
Charge = Proton – Electron
–2 = 8 – Electron
Collect like terms
–2 – 8 = – Electron
– 10 = – Electron
Electron = 10
ii. Determination of the nucleon number
- Proton = 8
- Neutron = 8
- Nucleon number =?
Nucleon number = Proton + Neutron
Nucleon number = 8 + 8
Nucleon number = 16
How to determine the missing part of particle D
i. Determination of the number of protons
- Electron = 10
- Charge = +3
- Proton = ?
Charge = Proton – Electron
3 = Proton – 10
Collect like terms
3 + 10 = Proton
Proton = 13
ii. Determination of the number of neutrons
- Proton = 13
- Nucleon number = 28
- Neutron = ?
Nucleon number = Proton + Neutron
28 = 13 + Neutron
Collect like terms
28 – 13 = Neutron
Neutron = 15
Complete question
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