chemistry crossword

2. The specific set of principal, angular momentum, and magnetic quantum numbers for an electron.
5. The centre of an atom that contains protons and neutrons
7. Atoms of the same element that have different numbers of neutrons
8. A species with an overall negative charge
9. A gas law that relates volume and temperature at constant pressure and amount
12. A compound that increases the amount of OH− ions in an aqueous solution
14. A physical combination of more than one substance
15. a positive charged subatomic particle
17. neutral subatomic particle
19. negatively charged subatomic particle
20. the chemical elements in group one of the periodic system

1. Law of physics that states that the total energy of an isolated system does not increase or decrease.
3. A gas law that relates pressure and volume at constant temperature and amount
4. are located to the far right of the periodic table and make up the eighteenth column
6. the hardest part of chemistry
10. the science that deals with the properties, composition, and structure of substances
11. A combination of more than one element
13. A species with an overall positive charge
16. An element that exists in various colors and phases, is brittle, and does not conduct electricity or heat well
18. The number of things equal to the number of atoms in exactly 12 g of carbon-12; equals 6.022×1023 things
20. A compound that increases the amount of H+ ions in an aqueous solution