C1.7 PRINCIPLES OF CHEMISTRY

Question 1

ion formed from atoms by______

Answer 1

gain or loss of electrons

Question 2

metal LOSE electrons from their outer shells and form ______

Answer 2

positive ions

Question 3

Non-metal GAIN electrons from their outer shells and form ______

Answer 3

negative ions

Question 4

Atom that gain the electrons is said to be ____________

Answer 4

reduced

Question 5

Ionic bonding is

Answer 5

the complete transfer of valence electron(s) between atoms.

Question 6

valence electron is

Answer 6

an OUTER SHELL electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed

Question 7

An ion is

Answer 7

a charged atom or molecule.

It is charged because the number of electrons do NOT EQUALLY the number of protons in the atom or molecule.

Question 8

covalent substances are formed when………

Answer 8

when atoms of NON-METALS combine.

Question 9

covalent bonding

Answer 9

electron sharing and occurs between atoms of non-metal.

For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.

Question 10

ionic compounds contains………

Answer 10

A METAL combined with non-metal.