An ion is

What is electromagnetism?

A hydrogen atom is different from other atoms because

The periodic table shows how _______ relate to each other

Friction causes protons to move from one atom to another

Atoms usually have equal amounts of protons and electrons

Pushing a pen off a desk converts potential energy to kinetic energy

When an atom has more electrons than protons, it has a negative charge

All atoms have eight electrons in their outer shell

What is sound?

Which of the following is not an example of kinetic energy?

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