Crossword

2. The central part of an atom that contains protons and neutrons.
4. The principle that atoms tend to form bonds so that they have eight electrons in their outermost shell.
5. A negatively charged ion, formed when an atom gains an electron.
10. The number of protons in the nucleus of an atom, defining the element.
11. An atom or molecule that has gained or lost one or more electrons.
12. A positively charged particle found in the nucleus of an atom.
13. The basic unit of matter, consisting of protons, neutrons, and electrons.
14. Bond A bond formed when two atoms share electrons to achieve a full outer shell.

1. Bond A bond formed when one atom donates an electron to another, creating oppositely charged ions.
2. A particle with no charge found in the nucleus of an atom.
3. A way of representing a compound using symbols and numbers to show the elements and their ratios.
6. The total number of protons and neutrons in an atom’s nucleus.
7. A positively charged ion, formed when an atom loses an electron.
8. Electrons in the outermost shell that are involved in chemical bonding.
9. A positively charged particle found in the nucleus of an atom.