Elementary Particle | Charge | Mass |
---|---|---|
Proton | +1 | 1 |
Neutron | 0 | 1 |
Electron | −1 | ~0 |
Number of Electrons in Each Shell | ||||||
---|---|---|---|---|---|---|
Element | Symbol | Atomic No. | First | Second | Third | Fourth |
Hydrogen | H | 1 | 1 | |||
Helium | He | 2 | 2 | |||
Lithium | Li | 3 | 2 | 1 | ||
Beryllium | Be | 4 | 2 | 2 | ||
Boron | B | 5 | 2 | 3 | ||
Carbon | C | 6 | 2 | 4 | ||
Nitrogen | N | 7 | 2 | 5 | ||
Oxygen | O | 8 | 2 | 6 | ||
Fluorine | F | 9 | 2 | 7 | ||
Neon | Ne | 10 | 2 | 8 | ||
Sodium | Na | 11 | 2 | 8 | 1 | |
Magnesium | Mg | 12 | 2 | 8 | 2 | |
Aluminum | Al | 13 | 2 | 8 | 3 | |
Silicon | Si | 14 | 2 | 8 | 4 | |
Phosphorus | P | 15 | 2 | 8 | 5 | |
Sulphur | S | 16 | 2 | 8 | 6 | |
Chlorine | Cl | 17 | 2 | 8 | 7 | |
Argon | Ar | 18 | 2 | 8 | 8 | |
Potassium | K | 19 | 2 | 8 | 8 | 1 |
Calcium | Ca | 20 | 2 | 8 | 8 | 2 |
Scandium | Sc | 21 | 2 | 8 | 9 | 2 |
Titanium | Ti | 22 | 2 | 8 | 10 | 2 |
Vanadium | V | 23 | 2 | 8 | 11 | 2 |
Chromium | Cr | 24 | 2 | 8 | 13 | 1 |
Manganese | Mn | 25 | 2 | 8 | 13 | 2 |
Iron | Fe | 26 | 2 | 8 | 14 | 2 |
. | . | . | . | . | . | . |
Selenium | Se | 34 | 2 | 8 | 18 | 6 |
Bromine | Br | 35 | 2 | 8 | 18 | 7 |
Krypton | Kr | 36 | 2 | 8 | 18 | 8 |