Search it up pppppp pp pp
Answer:
NH3 , SO3 , BF3
Explanation:
trigonal planar = AB3 ------------> Coordination number = 3
for example = NH3 , SO3 , BF3
all of them are trigonal planar

What is defined as the basic unit in the metric system that describes a quality?
Answer:
the metric system is a system of measurement that uses the meter, liter, and gram as base units of length (distance), capacity (volume), and weight (mass) respectively.
:D Hope this helps!
Zn (Zinc) is metal
Ne (Neon) is nonmetal
Mg (Magnesium) is metal
Fe (Iron) is metal
Cl (Chlorine) is nonmetal
Answer;
Cesium
Explanation;
-Cesium atoms have 55 electrons and the shell structure is 2.8.18.18.8.1. The ground state electron configuration of ground state gaseous neutral cesium is [Xe].6s1. The atom has a valence of 1, meaning it requires to loose one electron to form a stable configuration. Compared with alkali metals lithium rubidium and sodium its atom has the greatest amount of energy at ground state.