1. the negatively charge sub-atomic particles of an atom.
a. atom
b. neutron
c. proton
d. electron
2. it is a type of covalent bond with electronegativity difference of 0.4 or less.
a. chemical bond
b. ionic bond
c. non polar covalent bond
d. polar covalent bond
3. which of the following model of atom describe the probability of finding electrons outside the nucleus of the atom?
a. planetary model
b. quantum mechanical model
c. plum pudding model
d. gold foil
4. the octet rule requires that each atom should have 8 electrons to become stable.
a. false
b. true
c. neither true or false
d. none of the above
5. which of the following cannot be considered in checking the physical properties of compounds
a. ability
b. conductivity
c. hardness
d. solubility
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