Ta, os, rh the periodic table these create what metal, non metal, gas or metalloid

Transition metals

Explanation:

The given metals are found in the group B of the periodic table, also known as the transition metals group. Ta, Os and Rh are found in the periodic table labeled by atomic numbers of 73, 76 and 45.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the maximum mass of nh3 is nh3 in grams