Different what of an element have different numbers of neutrons

Ions

Isotopes

Compounds

Molecules

What is the charge on oxygen (O) when it forms an ion? 1+ 1- 2+ 2-

Exhaled air contains 16% oxygen by volume. Assuming you exhale like the average person does during strenuous exercise (that is, you exhale 1L of air per breath and you exhale 40 breaths per minute) ad assuming the dive will take 90 minutes, what

How do you find the pH when you are given the pOH

Why are noontime shadows longer in winter than in summer? Same as my last question this is astronomy not chemistry.

If I was inside hurricane Irma like the actual hurricane in the water would I die or surf the waves and be booling

How many neutrons does xenon have?

Warm air pushes cool air downward Rising air cools and becomes more dense than the air around it. True/false

How does a nuclear reactor work

Why is a very small amount of cerium oxide nanoparticles need: A) the nanoparticles are elements B) the nanoparticles are very reactive C) the nanoparticles have a high surface area of volume ratio

How do electrons move between atoms to create electricity?