SPS1 Periodic Table

4. Model included a nucleus with a positive electric charge. Negatively charged electrons moved in orbits around the nucleus.
6. model of atom in which the electrons seem to form a cloud as they move around the nucleus
8. Vertical column in the periodic table
11. another name for group
12. Basic unit of matter
14. A region of space within an atom in which electrons with the same energy are generally located. Determined by the period the element is located on.
15. An atom or group of atoms that has a positive or negative charge.
16. an element that is typically dull in appearance and is a poor conductor of electricity. Many are gases at room temperature.
19. Atom with the same number of protons but different numbers of neutrons.
22. A chart of the elements showing the repeating pattern of their properties
23. Electrons in the outermost energy, or electron shell. This determines how the atom will react chemically with other atoms.

1. A subatomic particle that has a positive charge and that is found in the nucleus of an atom. Has a mass of 1 AMU
2. Elements that have properties of both metals and nonmetals.
3. Mass the weighted average of the masses of the isotopes of an element
5. A pure substance made of only one kind of atom.
7. A subatomic particle that has a negative charge. Found outside the nucleus. Mass of 0 AMU
9. When an atom loses and electron. The excess charge comes from protons.
10. A unit of mass that measure the relative amounts of matter in atoms. (AMU)
13. A horizontal row of elements in the periodic table
17. an element that is solid at room temperature, a good conductor of heat and electricity, and generally is shiny; most metals are ductile and malleable
18. protons, neutrons, electrons
20. When an atom gains an electron. The excess charge comes from electrons
21. A subatomic particle that has no charge and that is found in the nucleus of an atom. Has a mass of 1 AMU