Question
What about a rubber band, can it change its shape? Is it solid?
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Helium atom has 2 electrons in its valence shell but its valency is not 2, Explain.
Ion | Valency(Charges) | Ion | Valency(Charge) |
Sodium ion | 1+ | Bromide ion | 1- |
Ammonium ion | 1+ | Hydroxide ion | 1- |
Calcium ion | 2+ | Sulphate ion | 2- |
Lead ion | 2+ | Phosphate ion | 3- |