Grade 8 Unit 2 Review

4. A negatively charged particle that orbits the nucleus of an atom.
7. Elements that are good conductors of heat and electricity and are malleable.
8. A positively charged particle found in the nucleus of an atom.
13. The ability of an atom to attract electrons in a chemical bond.
15. metals Elements found in the middle of the periodic table with variable oxidation states.
16. number The number of protons in an atom, which determines the element.
17. A vertical column in the periodic table.
19. A negatively charged ion formed when an atom gains electrons.

1. gases Elements in Group 18 that are unreactive due to having full outer shells.
2. covalent structure A structure where atoms are bonded in a continuous network, such as diamond or graphite.
3. The tendency of an element to undergo chemical reactions.
5. table A chart that organizes elements based on their properties.
6. bond A type of bond where atoms share electrons.
9. The central part of an atom that contains protons and neutrons.
10. A particle in the nucleus of an atom that has no charge.
11. A charged particle formed when an atom gains or loses electrons.
12. A positively charged ion formed when an atom loses electrons.
14. Elements in Group 17 that are highly reactive non-metals.
16. metals Elements in Group 1 that are highly reactive and form alkaline solutions.
18. bond A type of bond formed when electrons are transferred from one atom to another.