In which two groups are mixtures classified? * Heterogeneous and homogeneous
Solid and liquid
Liquid and gaseous
Elements and compounds

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?