Oscar
Ivan
Ong Jun Hao
Terrence
Ivan
Ong Jun Hao
Terrence
What is an ionic bond?
Electrostatic attraction between oppositely charge ion.
Covalent compounds/ molecules are formed when atoms.....
share pair of electron
What is metallic bonding?
electrostatic force between positively charge ion and negative charge sea of electron.
How positively charge ion form? Na+
By losing electron
How negatively charge ion formed? O2-
By gaining electrons.
What is the formula for the compound formed when Al3+ join with Cl-
AlCl3
What is the formula for the compound formed when Mg2+ join with F-
MaF2
What is the formula for calcium oxide?
CaO
What is the overall charge of the compound sodium chloride?
0/ neutral
What is the formula for the compound when K+ join together with S2-
K2S
What is the name of the compound BaCl2
(Ba: Barium, Cl:Chlorine)
Barium Chloride
What is the physical properties of ionic compound
high melting point/ brittle/ soluble in water/ solid at room temperature
Covalent bonds take place between.....
non metal and non metal
What is the three types of chemical bonds?
Ionic bond
Covalent bond
Metallic bond
Example of giant covalent element/ compound?
Diamond, Silicon dioxide, graphite
Explain the difference between ionic and metallic bonding.
Ionic bond: electrostatic attraction between oppositely charge ion
Metallic bond: electrostatic attraction between positive charge ion and negative sea of electrons
Which pair of elements is most likely to form an ionic compound?
A. Carbon and hydrogen
B. Oxygen and nitrogen
C. Sodium and chlorine
D. Hydrogen and chlorine
C
Which property is commonly associated with metals?
A. They can be hammered into sheets
B. They always have low melting points
C. They never conduct heat
D. They dissolve easily in water
A
Physical properties of giant covalent element/ compound?
high melting point
Which substance contains covalent bonds?
A. Sodium chloride (NaCl)
B. Magnesium (Mg)
C. Water (H₂O)
D. Potassium bromide (KBr)
C
Which rule must be fulfilled by sharing or transferring electrons to create bonds?
to achieve stable structure.
Why ionic compound has high melting point?
strong electrostatic attraction between oppositely charge ions.
Compare the melting points of simple molecular covalent substances and giant covalent structures.
Simple molecular covalent substance will have low melting point because of the weak intermolecular force between molecules
Giant covalent structure will have high melting point because the strong covalent bond between the atoms.
Why are metals good conductors of electricity?
the sea of electron are free to move
Why oxygen (simple molecules) has low melting point?
Weak intermolecular bond between molecules