WorksheetsChemical Bonds
Total questions: 21
Worksheet time: 12mins
Chemical bond is ...
the physical mixing of two different atoms.
the force that holds two atoms together
the energy used up when two atoms combined.
the temperature that changes the phase of matter.
When does chemical bond occur?
when an electron is transferred into another atom
when an atom share its electron with another atom
when the valence electrons of the atom is complete
when the atom has an equal number of protons and electrons
Which is not true of the chemical bond shown on the diagram?
An electron from Na is transferred to Cl.
The bond is ionic since electron is shared by the two atoms.
A metal and a non-metal are involved in the bonding.
Na will become positively charged and Cl will be negatively charged.
All are correct about ionic bonding, except...
It is an electrostatic force of attraction between opposite charges.
It occurs between a metal and a non-metal atoms.
It happens when electrons are shared by the atoms.
It involved the loss and gain of electrons.
Which two statements are correct about the figure shown?
It is a covalent bond.
Hydrogen atoms loss electrons and Carbon gains the atoms.
It happens on metal and on another non-metal.
The valence electrons are shared by both atoms.
Why does an atom tend to chemically bond with another atom?
To become more stable
To remain on its present state
To maintain its energy
To decrease its stability
Check all that characterizes an ionic compound.
Hard
non-conductor of heat and electricity
High melting and boiling points
non-soluble in water
Check two general properties of a molecular compound.
Hard
Soft
Low melting point
poor conductor of electricity when in solid state.
Which two are ionic compounds?
NaCl
HCl
CH4
CaO
Which two are molecular compounds?
MgO
Al2O3
CO2
H2O
Covalent bonds are formed between
metals
non-metals
metal and non-metal
metalloids
Which of the following atoms is most likely to bond with another atom?
Atom A has seven electrons in its outer shell. Atom B has one electron in its outer shell. They react and bond. Now both atoms have eight electrons in their outer shells. What kind of bond has formed?
Covalent
Ionic
Metallic
Electron
