Atomic Structure and Mass
Atomic Structure
Group 13Boron - 5 p+, 5 e-, 6 n
Aluminum - 13 p+, 13 e-, 14 n Gallium - 31 p+, 31 e-, 39 n Indium - 49 p+, 49 e-, 66 n Thallium - 81 p+, 81 e-, 123 n |
Period 7Francium - 87p+, 87e-, 136n
Radium - 88p+, 88e-, 138n Actinium - 89p+, 89e-, 138n Thorium - 90p+, 90e-, 142n Protactinium - 91p+, 91e-, 140n Uranium - 92p+, 92e-, 146n Neptunium - 93p+, 92e-, 144n, Plutonium - 94p+, 94e-, 150n Americium - 95p+, 95e-, 148n Curium - 96p+, 96e-, 151n Berkelium - 97p+, 97e-, 150n Californium - 98p+, 98e-, 153n Einsteinium - 99p+, 99e-, 153n Fermium - 100p+, 100e-, 157n Mendelevium - 101p+, 101e-, 157n Nobelium - 102p+, 102e-, 157n Lawrencium - 103p+, 103e-, 159n Rutherfordium - 104p+, 104e-, 157n Dubnium - 105p+, 105e-. 157n Seaborgium - 106p+, 106e-, 157n Bohrium - 107p+, 107e-, 155n Hassium - 108p+, 108e-, 157n Meitnerium - 109p+, 109e-, 157n |
Average Atomic Mass
Group 13Boron: 10.81
Aluminum: 26.982 Gallium: 69.72 Indium: 114.82 Thallium: 204.383 |
Period 7Francium: 223
Radium: 226.025 Actinium: 227.028 Thorium: 232.038 Protactinium: 140.908 Uranium: 238.029 Neptunium: 237.048 Plutonium: 244 Americium: 243 Curium: 247 Berkelium: 247 Californium: 251 Einsteinium: 252 Fermium: 257 Mendelevium: 258 Nobelium: 259 Lawrencium: 262 Rutherfordium: 261 Dubnium: 262 Seaborgium: 263 Bohrium: 262 Hassium: 265 Meitnerium: 266 |
How to Calculate Atomic Mass
Number of Protons + Number of Neutrons=Atomic Mass
Example 1: Boron Example 2: Aluminum
Number of Protons: 5 Nunber of Protons: 13
Number of Neutrons: 6 Number of Neurtons: 14
Atomic Mass=About 11 amu [when rounded] Atomic Mas=about 27 amu [when rounded]
Example 1: Boron Example 2: Aluminum
Number of Protons: 5 Nunber of Protons: 13
Number of Neutrons: 6 Number of Neurtons: 14
Atomic Mass=About 11 amu [when rounded] Atomic Mas=about 27 amu [when rounded]