1) What is a column called in the periodic table and what do the elements in each column have in common?
A)
period; the same atomic mass
B)
group; the same number of electrons
C) period; the same number of atomic orbitals
D) group; the same number of valence electrons

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation