Physical Science L2J Crossword

2. A class of elements that form anions in reactions, chemical opposites of metals
5. A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.
7. The smallest part of an element that can take part in a chemical change
14. The general name for group II elements
15. A negatively charged particle surrounding the nucleus of an atom
16. Positively charged particle found inside the nucleus of an atom
19. The general name for group VII elements
20. The general name for group 0 elements
21. The splitting of an atomic nucleus to release energy.
22. Substance made up of two or more elements chemically combined together
24. Energy stored in chemical bonds
25. Horizontal row of the Periodic Table

1. Energy that is radiated or transmitted in the form of rays or waves or particles.
2. Energy stored in the nucleus of an atom
3. The general name for group I elements
4. Atoms having the same atomic number but different mass number
6. A substance which cannot be split into simpler form by chemical means
8. A class of elements that form cations in reactions, conduct electricity, ductile and malleable
9. Creation of energy by joining the nuclei of two hydrogen atoms to form helium.
10. A chemical bond that involves sharing a pair of electrons between atoms in a molecule
11. A measure of the ability of an atom in a chemical compound to attract electrons
12. decay A spontaneous process in which unstable nuclei lose energy by emitting radiation
13. Electrons on the outermost energy level of an atom
17. one-half the distance between the nuclei of identical atoms that are bonded together
18. Vertical column of the Periodic Table
23. A neutral particle found inside the nucleus of an atom