| A | B |
| Element hydrogen | Molecular Formula H 2 Phys.St.@room temp gas |
| Element nitrogen | Molecular Formula N2 Phys.St.@room temp gas |
| Element oxygen | Molecular Formula O2 Phys.St.@room temp gas |
| Element fluorine | Molecular Formula F2 Phys.St.@room temp gas |
| Element chlorine | Molecular Formula Cl2 Phys.St.@room temp gas |
| Element bromine | Molecular Formula Br2 Phys.St.@room temp liquid |
| Element iodine | Molecular Formula I2 Phys.St.@room temp solid |
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