Why is the chemical formula magnesium sulfide written as MgS and NOT Mg2S2?

Which phase of matter consists of particles that vibrate only?

he universal law of gravity states that all objects attract all other objects. Why is this considered a universal law? A. Gravity is a principle that is in effect at all times. B. The universe has many objects in it that have gravity. C.

According to the Aufbau principle, a. electrons enter orbitals of lowest energy first. b. electrons enter orbitals of highest energy first. c. an orbital may be occupied by only two electrons. d.

You discover a Cepheid variable star with a 30 day period in the Milky Way. Through careful monitoring for a few years with the Hubble Space Telescope, you determine that it has a parallax of 0.004 arcseconds.

Why don't the noble gases form compounds readily? A. they have empty outer energy levels B. they have no electrons C. they have seen electron in the outer energy level D. their outer energy level are completely filled with electrons

Describe the position of earth moon and sun during a solar eclipse

What is an output force? a. the force a person applies to a simple machine b. the force a simple machine applies to an object c. the net force on a system d. the applied force on a system

Would iron and carbon from metallic bonds

How many joules does a shortbread cookie have

What happens to frequency when an object is moving towards you?