Large tides, called spring tides, are experienced in the earth's oceans when the moon is in position
a) a.
b) b.
c) a and c.
d) b and d.

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.