Flashcards in Ch 4 Deck (17)
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1
Theory that states in part that most of the volume of the atom is empty space
Nuclear theory of the atom
2
One 12th of the mass of a Carbon atom containing six protons and six neutrons
Atomic mass unit (amu)
3
Number of protons in the nucleus of an atom
Atomic number (Z)
4
One or two letter abbreviations for an element
Chemical symbol
5
When the elements are arranged in order of increasing atomic number, certain set of properties recur periodically
Periodic law
6
Elements whose properties tend to be more predictable based on their position in the periodic table
Main group elements
7
Elements whose properties tend to be less predictable based simply on their position in the periodic table
Transition metals
8
Column of elements in the periodic table
Family or group (of elements)
9
Group 8A elements
Noble gases
10
Group 1A elements
Alkali metals
11
Group 2A elements
Alkaline earth metals
12
Relative amount of an isotope in a naturally occurring sample of a given element
Percent natural abundance
13
Some of the number of protons and neutrons in an atom
Mass number (A)
14
Subatomic particles emitted from unstable nuclei
Nuclear radiation
15
Average mass of the atoms that compose an element
Atomic mass
16
Characteristic of unstable nuclei that emit radiation
Radioactive
17
