We learned that matter is made of atoms which are very small and the Atomic Theory is a scientific explanation of the structure of atoms and how they interact with other atoms. We learned that atoms have a dense nucleus made of protons which have a positive charge and neutrons which have no charge. Outside the nucleus there are negatively charged electrons speeding around in an area named the electron cloud. We learned that there are many kinds of matter and an element is the type of matter made of just one kind of atom. Then we learned that all known elements are organized by their properties in the Periodic Table of Elements. Next we learned that different atoms of the same element can contain different numbers of neutrons and electrons can be gained or lost but the number of protons in an element always stays the same. This is why elements in the Periodic Table of Elements are given an atomic number equal to the number of protons.
Assignment: We made compounds from atoms of elements