Ions/molecules/ formulae

Question 1

give 6 characteristics for ions/ molecules and formulae

Answer 1

• ionic bonding always occurs between metals & non-metals
• between ions a force of electrostatic attraction exist -> strong force = very high melting points
• solids at standard temperature form an ionic lattice
• dissolve in water -> water molecules are polar and separate ions
• conduct electricity when dissolve or when Molton
• electrostatic force strength depends on the charge of the ions (2+ charge produces stronger electrostatic force than 1+ charge)/ ionic radius (ions with a smaller radius produce stronger electrostati forces)

Question 2

what are the rules for naming a compound?

Answer 2

• if 2 elements (a metal and non-metal) -> metal stay the same/ non-metal name end in (ide)
• if 3 elements (a metal and 2 non-metal (1 has to Oxygen)) -> metal stay the same/ non-metal name ends in (ate)

Question 3

you need to know these complexions, what are their element, charge and name?

Answer 3

NH(4)+ // Amonium

OH- // hyodroxide

SO(4)2- // sulfate

CO(3)2- // carbonate

NO(3)- // nitrate