Covalent bonding, structures and properties of simple covalent molecules

Question 1

what are convalent bonds?

Answer 1

shared pairs of electrons

Question 2

what is a double covalent bond

Answer 2

two pairs of electrons that are shared between the same atoms

Question 3

what is a triple convalent bond

Answer 3

three pairs of electrons that are shared between the same atoms

Question 4

when do convalent bonds form

Answer 4

when non-metal atom share their outer electrons in order to complete their outer shell and become more stable

Question 5

what are the properties of simple convalent substances

Answer 5

low melting and biling points, variable solublity in water, poor conductors of electricity

Question 6

why do simple covalent bonds have high melting and boiling points

Answer 6

The bond between them is strong but they are attracted by very weak intermolecular forces which can be overcome by small amounts of heat energy

Question 7

why are simple covalent substances poor conductors of electricity

Answer 7

they do not have free electrons to move the electricity

Question 8

what is the solubility in water of simple covalent substances

Answer 8

it varies between substances