Which of the following groups contains members with similar chemical reactivity? 1. Na, Mg, P
2. N, P, Bi
3. B. Si, At
4. Rb, Ag, Sn

How did planetesmals form planets? a. they broke apart into smaller chunks.b. they collided and stuck together.c. they cooled and pulled ice together.d. they began to rotate.

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Place the elements below in order of decreasing ionization energy. aluminum(al) chlorine(cl) magnesium (mg) sulfur(s)