In each of the following pairs, circle the species with the larger atomic or ionic radius: (a) Mg or Ba
(b) S or S2-
(c) Cu+2 or Cu
(d) He or H-
(e) Na or Cl

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.

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.