Aplant grows toward the light. the plant’s action is an example of

a.

reproduction.

b.

a response.

c.

a stimulus.

d.

development.

List four observations that indicate that a chemical reaction may be taking place

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

If it is an isoelectronic series select true, if not select false. o2-, s2-, se2-, te2- na+, k+, rb+, cs+ n3-, p3-, as3-, sb3- ag, cd+, sn3+, sb4+ f-, cl-, br-, i- f-, ne, na+, mg2+ s2-, s, s6+