The three states of matter, solids, liquids and gases, are found in our everyday lives. Some examples of solids are rocks, tables and boxes. Solids do not change their shape easily. For example, you can’t easily break a chair, or take it out of its shape. Some examples of liquids are water, milk and juice. The shape of a liquid changes based on its container. For example, when you pour lemonade from a pitcher into a glass, it changes shape. Some examples of gases are air and helium. Matter in the state of gas doesn’t have a certain shape or size. It can be used to fill a container or be squeezed into a smaller space.
This is a diagram of the inside of an atom. The blue dots are neutrons, the red ones are protons and the yellow ones are electrons.
You can also see that in the first shell of an atom there are 2 electrons and in the second shell there are 8 electrons.
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