Name:
…………………………..……………………………
.
Term:
1
Date:
Subject:
Chemistry Worksheet
Grade:
8
Section:
Lesson:
Related to Chapter 7 and 8
…………………………………………………....
I. Compare between ionic bond, covalent bond and metallic bond:
Ionic Compounds
Molecular Compounds
Metals
Bond between
Metal + Nonmetal
Nonmetal + Nonmetal
Metal
Type of bond
Ionic bond
Covalent bond
Metallic bond
Define the bond
Ionic bond is the electrostatic
Covalent bond is a bond
Metallic bond is the force of
force of attraction between
formed by sharing electrons
attraction between free floating
anions and cations
between atoms
valence electrons and metal
cations.
Bond is formed
Metal loses electrons and
by
nonmetal gains electros
Electrical
No conduction in solid state
Conductivity
Good conductors in molten or
Nonmetals share electrons
Valence electrons form sea of
moving electrons
Poor conduction **
Good conductors of electricity in
solid state.
when dissolved in water
Melting and
High
Low
High
Crystalline solids
Usually liquid or gas
Malleable and ductile solids
NaCl (table salt)
H₂O (water)
Iron (Fe)
Boiling Point
Phases at room
temperature
Example
TERM I - ACADEMIC YEAR 2018/2019
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