4) Use the periodic table to predict the charges that the following atoms will h

Question

4) Use the periodic table to predict the charges that the following atoms will have when they form lons a) Ca b) o c) Br d) Al e) Cs 5) Describe ionic bonds and covalent bonds and explain their differences. In your explanation include what types of atoms are likely to be involved in each type of bond and what is happening to the electrons of the atoms involved. 6) Indicate what types of chemical bonds are present in the following compounds (ionic, covalent, or both). a)H2O b) CaCl2 c) CuO d) NaNO3 e) (NH4)S04 SF6

Explanation / Answer

4. a) Ca2+ b) O2- c) Br- d) Al3+ e) Cs+

5.

Ionic bonds MgO,MgBr2CaS,Na2S,NaCl etc have ionic bondswhich is a complete transfer of elctrons from one atom to other to complete their outemost orbits.

Covalent Bonds H2, Cl2, O2, N2, H2O, NH3, CH4 etc have covalent bonds present which is formed by mutual sharing of electrons between them.

6. a) H2O = Covalent bond

b) CaCl2 = Ionic bond

c) CuO = Ionic bond

d) NaNO3 = Ionic and Covalent both

e) (NH4)SO4 = Ionic bond

f) SF6 = Covalent bond

ionic bond covalent bond it is formed by the transfer of elctrons from one atom to other it is formed by the sharing of electron pairs by the two atoms ionic substances are formed by ionic bonds molecules are formed by covalent bonds it is electrostatic it is not electrostatic but its rigid metal/non metal non metal/non metal high melting and boiling point low melting and boiling point

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