true false 2

false, can

two atoms CANNOT share more than one pair of electrons between them

true

sugar is an example of a COVALENT compound

true

argon is a NOBLE GAS element

false, lose

calcium has two valence electrons, and to become stable, it must GAIN TWO MORE electrons

true

the stability of the noble gas elements other than helium is a result of their having EIGHT valence electrons

false, electrons

an ion in an atom or group of atoms that is charged because it has lost of gained one or more PROTONS

true

covalent bonds involve electrons SHARED between two atoms

false, share

in electron dot structure ___ the pair of dots between the H and the Cl means that the hydrogen and chlorine atoms TRANSFER a pair of electrons between them

true

in general, ionic compounds are MORE likely to dissolve in water than are covalent compounds

true

ionic compounds CONDUCT an electric current in the molten state

true

ionically bonded compounds tend to be BRITTLE

false, weak

the forces of attraction between molecules tend to be STRONG

true

the formula C3H8 tells you that this compound contains three carbon atoms and EIGHT hydrogen atoms