Give the atomicity k2cr2o7,h2so4,mgci2,Al(so4)3
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Atomicity is the total number of atoms present in a compound
In K₂Cr₂O₇, there are 2 potassium, 2 chromium and 7 oxygen atoms, so, atomicity will be 2+2+7 = 11
Like in H₂SO₄, atomicity is 2 + 1 + 4 = 7
In MgCl₂ 1 + 2 = 3
in Al₂(SO₄)₃, 2 + 3(1 + 4)
Since there is one sulphur and and 4 oxygen atoms, and there are 3 entities of the sulphate ion, so, I have multiplied by 3
so in Al₂(SO₄)₃, the atomicity will be 2 + 15 = 17
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