Why do scientist use different types of models to represent compounds

Which best describes how magnesium and oxygen bond? a. they form an ionic bond by exchanging two electrons. b. they form an ionic bond by exchanging three electrons. c. they form a covalent bond by sharing one electron. d.

Calculate the power in kilowatts required to lift a 500 kg mass 12 meters in one second

Why does the uncertainty principle make it impossible to predict a trajectory for the electron?

Which list accurately identifies the hierarchy of space from largest to smallest? Universe, solar system, galaxy, planet Galaxy, solar system, universe, planet Galaxy, solar system, universe, moon Universe, galaxy, solar system, moon

Why do we say "work done" and "energy change"

What is the oxidation state of a hydrogen atom bound to an iron atom.?

What evidence can you present for the possibility of time travel?

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

What was the change in internal energy (chemical energy plus thermal energy) of the person pulling the block?

One of the longer sides of a kite is 39 feet. one of the shorter sides is 25 feet. half the length of the shorter diagonal is 15 feet. what is the area of the kite?