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- 3. A negatively charged subatomic particle founding the electron cloud and has very little mass
- 5. A positively charged subatomic particle founding the nucleus and makes up about half of the mass of an atom.
- 7. The tiny, very dense, positively charged region in the center of an atom; made up of protons and neutrons
- 8. Majority of the elements on the periodic table are solid, shiny, malleable, and good conductors of heat and electricity.
- 10. A substance produced during a chemical reaction
- 11. A pure substance made of only one kind of atom
- 12. A group of atoms bonded together; Can be the same elements or different elements
- 13. The process by which one or more substances change to produce one or more different substances.
- 15. A substance that takes part in and undergoes change during a reaction
- 17. The electrons in the outermost energy level of an atom that influence the reactivity of the element
- 20. A small number written below and to the right of a chemical symbol that shows the number of a specific type of atom present.
- 22. Matter is neither created nor destroyed. Therefore, mass of all reactants must equal the mass of all products.
- 24. The smallest particle of an element, made of electrons, protons, and neutrons
- 25. A number placed in front of a chemical symbol or formula in order to balance the equation.
- 26. A substance made of two or more elements chemically combined; must be more than one type of element
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- 1. A table showing the chemical elements arranged according to their atomic numbers
- 2. The rows in a Periodic Table that classify the elements by the number of electron shells/energy levels
- 4. The columns on a Periodic Table that arrange the elements by the number of valence electrons in the outermost shell.
- 5. A solid that forms from two liquids in a solution during a chemical reaction.
- 6. the area surrounding the nucleus of an atom; where the electrons are found
- 9. the mass of an atom, approximately equal to the number of protons and neutrons in the atom
- 14. Chemical formulas and symbols written to represent a reaction
- 16. Elements that have properties of both metals and non-metals; sometimes referred to as semiconductors
- 18. Elements not shiny, usually a gas or brittle solid, not malleable, and poor conductors of heat and electricity
- 19. A combination of symbols that represent the elements in a compound
- 21. the number of protons in the nucleus of a single atom
- 23. A neutrally charged subatomic particle founding the nucleus and makes up about half of the mass of an atom.