1 Allotropes of an element have different (a) chemical structure (b) electrons (c) neutrons (d) physical structure
2. isotopes of the same element have the same (a) ions (b) mass (c) neutron (d) proton
3. from the ideal gas equation, PV=nRT, the units is? (a) atm (b) Atm K (c) Mole (d) atm mole
4 the two types of bonds that exists in ammonium ion are (a) covalent and ionic (b) dative and covalent (c) dative and ionic (d) hydrogen bond and covalent?
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Asked by dr.s.a.otaru on 8th December, 2018
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