How many valence electron do xenon have

Neptune's Triton is being pulled closer and closer to the planet as it orbits. What will likely be a result of this gravitational force in the future?

Explain why the periodic table is not a normal table of rows and columns

What is the concentration of hydronium in each of the following cases: [OH-] = 10-12 M? [OH-] = 10-2 M?

What is meant by enthalpy change?

A gas container in a thick walled balloon. when the pressure changes from __kPa to 114kpa, the volume changes from 0.654L to 1.32 L and the temperature changes from 596 K to 715 k

Lenny accidentally drops his matchbox car into a graduated cylinder. if the car has a mass of 10 grams and the water level in the cylinder rises from 41 ml to 46 ml. determine the density of the matchbox car. the formula for density is d = m v

When 12.4 grams of KBr are dissolved in enough water to create a 170-gram solution, what is the solution's concentration, expressed as a percent by mass?

The Bohr theory can be extended to non-hydrogen one electron ions such as He + and Li2+, in which case the energy depends on the different atomic numbers Z for the respective atom.

Each day the earth spins on its axis. this is known as what?

Is Fe a element or a compound? Is Aluminum a element or a compound? Is HCI a element or a compound? Is Hydrogen Peroxide element or a compound? Is H2 element or a compound? Is NaOH element or a compound?