If calcium has the atomic number 20

mass number 40, both protons and neutrons are 20 would that make its electrons 18 or 22?

Angie designs an experiment to investigate different types of music

What happens when the amplitude of a sound wave changes?

A red-hot iron nail is immersed in a large bucket of water. Although the nail cools down sufficiently to be held bare-handed, the temperature of the water barely increases. Which properties keep the water temperature from changing much? A.

What type of compound is almost always found as a solid? Metallic Covalent Nuclear Ionic

Which has a higher specific heat value water or iron?

For the baeyer-villiger oxidation of cyclohexyl methyl ketone

What will happen if the density of an object is less than the density of water?

Which cannot be separated into simpler substances? compound element solution mixture

What jobs involve chesmistry

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.