The stages of the protozoan life cycle are: A. beginning, growth, and adulthood
B. beginning, hatching, and adulthood
C. beginning, fertilization, and adulthood

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the maximum mass of nh3 is nh3 in grams

i believe the answer is three water molecules