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प्रश्न
State the valency of the following metallic element and write symbol with the valency
Magnesium
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उत्तर
Metals have positive valency 1, 2 or 3,
| Element | Symbol | Valency |
| Magnesium | \[\ce{Mg}\] | \[\ce{Mg^2+}\] |
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| (d) Krypton | (4) He |
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