MATTER AND ATOMIC STRUCTURE UNIT TEST ANSWERS
1. As thermal energy increases, there is more particle movement.
2. Benedict’s test
3. the presence of starch
4. weight
5. Yes, it would hurt because the bricks would still have the same mass.
6. The density will remain the same because mass and volume will both increase in the same way.
7. from a liquid to a gas, and back to a liquid
8. Anything made in the lab requires natural resources to produce it.
9. It is a synthetic material that comes from natural resources.
10. a place where plastic and other waste has collected in the Pacific Ocean
11. The atoms in lithium sulfide are held together by bonds.
12, 13, 14: write your own answer!
12. The atomic structure of an atom consists of a dense nucleus, which contains positively charged protons and neutral neutrons. Surrounding the nucleus are negatively charged electrons, which orbit in energy levels or shells.
13. The atomic number of an element represents the number of protons in its nucleus. It determines the element's identity and its position on the periodic table.
14. Isotopes are variations of an element that have the same number of protons but different numbers of neutrons. This results in different atomic masses for isotopes of the same element.