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4.a characteristic used to identify a substance
7.he discovered the nucleus in an atom
10.he proposed the three part atomic theory
15.a blend of two or more kinds of matter, each of which retains its own identity
16.closeness of a set of measurements of the same quantity
17.he said that electromagnetic radiation has a dual wave-particle nature
20.lowest energy state of an atom
24.he proposed an equation that treated electrons in atoms as waves
25.data that is descriptive
29.group 17 nonmetals
30.group two metals
32.mutual attraction between then nuclei and valence electrons of different atoms that binds the atom together
38.refers to emissions of electrons from a metal when light shines on it
39.a broad generalization that explains a body of facts
41.can be beaten into sheets
42.volume and mass and density are examples of these
43.molecule of only two atoms
44.neutral group of atoms that are held together by covalent bonds
1.the central part of an atom containing protons and neutrons
2.the number of quantum numbers
3.he stated that electrons move like planets around the sun
5.a negative subatomic particle
6.the total number of protons and neutrons in the nucleus
8.he called nature's basic particle the atom
9.group 18 nonmetals
11.a testable statement
12.it states that the chemical properties of elements can be grouped according to periodic functions
13.horizontal row on the periodic table
14.these compounds share electrons
18.waves overlap
19.data that uses numbers
21.ions rearrange themselves so they have the lowest possible potential energy
22.group one metals
23.this principle states that no two electrons can have the same set of quantum numbers
26.small specific packets of energy
27.can be drawn into wires
28.these compounds are formed by the transfer of electrons
31.the number of protons in the nucleus of an element
33.3-D regions around the nucleus that indicates the probable location of an electron
34.pure substance that can't be broken down
35.this principle says that an electron occupies the lowest energy level first
36.bonding in molecules or ions that can't be correctly represented by a single Lewis structure
37.any substance that has a definite composition
40.a positive subatomic particle

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