Unit 5 Vocab Words

5. The smallest part of an element that still has the properties of that element.
6. Metals usually lose electrons when they form chemical bonds.
7. A chemical bond that forms when a metal gives one or more of its electrons to a non-metal. This bond happens between a metal cation and a non-metal anion.
8. A type of ion that has a negative charge. It happens when an atom gains one or more electrons.
9. Atoms like to have a full set of electrons in their outer energy level, which is usually eight electrons.
11. A substance made from two or more elements that are chemically combined.
15. This is a process where atoms are rearranged to make new or different substances.
16. This tells us what elements are in a compound and how many of each element there are.
17. The smallest part of a covalent or molecular compound. For example, H2O is a molecule.
18. An atom that has either gained or lost electrons, which gives it a charge.

1. A bond that forms when two non-metal atoms share electrons.
2. A simple way to show how many of each element are in a compound. For example, H2O means there are two hydrogen atoms and one oxygen atom.
3. These are the electrons found in the outermost energy level of an atom. They are important for chemical bonding, and it takes energy to remove them.
4. A type of ion that has a positive charge. It happens when an atom loses one or more electrons.
10. A charged group of atoms made up of more than one atom. These often take part in ionic bonding.
12. Non-metals usually gain or share electrons when they form chemical bonds.
13. These are connections that form when two or more atoms share or move electrons.
14. These are specific areas where electrons are likely to be found. The lower the energy level, the closer it is to the center of the atom (the nucleus).