a) Define atomicity.
b) Give an example of a polyatomic element and a polyatomic ion.
c) How many atoms are present in the CaCl2 molecule and Sulphate ion?
d) Write down the formulae of:
a) Sodium Carbonate b) Ammonium Chloride c) Zinc Oxide d) Aluminium Hydroxide.
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- the number of atoms in the molecules of an element.
- Polyatomic Ionic Compound Sulfuric Acid
For example, sulfuric acid H2SO4 contains H+ and the polyatomic SO4-2. ... In sulfuric acid, the sulfate forms ionic bonds with the hydrogen atoms that donate an electron each to become hydrogen ions, H+. The sulfate receives the two electrons to become SO4-2.
- 3 atoms. One of calcium and two of chlorine.
- (a)sodium carbonate Na2CO3 (b)ammonium chloride NH4Cl (c)zinc oxide ZnO (d)aluminium hydroxide Al2(OH)3
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