Paul was looking at the sample of Neon isotopes below. He calculated average atomic mass by doing the following: 20 + 21 + 22 = 63 / 3 = 21 amu
Paul is told that his answer is incorrect but doesn't know why. Explain what's wrong with his calculation & answer

What happens to the atomic radius when an elctron is lost

What volume would 2.25 moles of ne has occupy at stp?

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.