Why do scientists use different types of models to represent compounds

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon