Chemistry, asked by prathyusha1662, 1 year ago

1 to 20 elements atomic mass and valency and atomic number

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Answered by 786juweriyah1

2

you may find the answer here

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Answered by Dɪʏᴀ4Rᴀᴋʜɪ

2

i prefer the attachment...❣️....

try other Valency ..it's easy....

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