unit 1 vocabulary choice board

4. element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
7. charge-basic property of matter carried by some elementary particles.
10. a stable subatomic particle occurring in all atomic nucleus.
13. mass-the mass of an atom of a chemical element expressed in atomic mass units.
15. cloud-An electron cloud is the region of negative charge surrounding an atomic nucleus.
16. metals-any of the set of metallic elements occupying a central block.
17. metals-any of the elements lithium, sodium, potassium, rubidium, cesium, and francium.
19. that is on the periodic table.
20. central and most important part of an object.
21. solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity.
23. quality or condition of being subatomic particle-a particle smaller than an atom.
24. an element or substance that is not a metal.
25. electrons-a single electron or one of two or more electrons in the outer shell of an atom.

1. horizontal rows of the periodic table are called periods.
2. mass unit-a unit of mass used to express atomic and molecular weights.
3. stable subatomic particle with a charge of negative electricity.
5. subatomic particle of about the same mass as a proton but without an electric charge.
6. properties-A physical property is any property that is measurable.
8. property-a property of a substance relating to its chemical reactivity.
9. gasses-any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table.
11. number-the number of protons in the nucleus of an atom.
12. table-the stuff that's on there.
14. number-the total number of protons and neutrons in a nucleus.
18. that makes up something.
22. the number of valence electrons.