Science

1. The parts that make up an atom
3. A substance that forms hydroxide ions in a solution
4. The branch of science that structures and properties of matter
6. Anything that has mass and takes up space
9. A substance that is made up of two or more different substances physically combined
11. A pure substance that is made of two or more different kind of atoms
13. A subatomic particle that has a positive charge
14. A type of bond that forms when electrons are transferred from one atom to another
16. A substance that forms hydrogen ions in a solution
17. Two or more atoms that are chemically bonded together
19. The energy that is transferred from warmer things to cooler things

2. The process in which substances react to form a new substance with different chemical compositions
5. A type of bond that forms when atoms share electrons
7. A pure substance that is made of one kind of atom, and it cannot be broken down into a simpler substance
8. A subatomic particle that has a negative charge
10. The area surrounding the nucleus where the electrons travel.
12. An atom that has become charged by gaining or losing electrons
13. An organized arrangement of elements according to their atomic number
15. A subatomic particle that has no charge
18. The smallest basic unit of matter