Within the p-block elements, the elements at the top of the table, compared with those at the bottom, a
have lower ionization energies.
b
are less metallic.
c
have larger radii.
d
are more metallic.

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots