What do elements in the first two columns of the periodic table have in common? (2 points)
a. they have two valence electrons.
b. they tend to lose electrons to gain stability.
c. they react strongly with the alkali metals.
d. they do not react with halogens.

What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

Acontrol during an experiment. might change remains constant does not exist does change

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid