A covalent bond is a shared pair of electrons. Covalent bonding results in the formation of molecules. Simple molecular substances have low melting and boiling points, and do not conduct electricity.
How many electrons are shared in a single covalent bond?
Carbon atoms and hydrogen atoms combine to make CH4, which is a covalent…….. What is the missing word?
What is represented by the diagram O = O ?
An oxygen molecule with a double bond
An oxygen molecule with a single bond
Two oxide ions joined together
Phosphorus is in group 5 of the periodic table. How many covalent bonds will phosphorus form in compounds?
Chlorine and hydrogen react together to form HCl. How many unbonded electrons will chlorine have in this compound?
Which molecule is represented by this dot and cross diagram?
Which of these hydrocarbon molecules will have the highest boiling point?
When covalent molecules melt or boil, what is broken?
Sucrose is a covalent compound. Under what circumstances does sucrose conduct electricity?
When molten and in solution
It does not conduct
Sodium chloride is often shown as a dot and cross diagram. What limitation is there in this representation?
It does not show the ionic lattice
It does not show the correct charges
It does not show full outer shells