CHEM 121 FINAL EXAM!
kinetic molecular theory
fundamental particle
h2o molecule
atom
molecule
element
compound
the same
solution
density
atomic number
mass number
isotope
atomic mass
alkali metals
alkali earth
halogens
properties of metals
properties of non metals
avagadros numb...
Ans: all matter is made of tiny particles that are constantly moving
2). Fundamental particle
Ans: take a macroscopic object and divide it repeatedly. Eventually you have a
particle, which, if further divided is no longer the original substance. This smallest piece
of the substance is called...
3). H2o molecule
Ans: the fundamental particle of water is what?
4). Atom
Ans: the basic unit of a chemical element
5). Molecule
Ans: two or more atoms (same or different) chemically bound
6). Element
Ans: fundamental particle contains only one kind of atom
7). Compound
Ans: two or more different kinds of atoms chemically bound
8). The same
Ans: in a pure substance, all the fundamental particles are what?
9). Solution
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, Ans: mixture that is uniform throughout
10). Density
Ans: = mass / volume
11). Atomic number
Ans: number of protons in the nucleus, defines the element
12). Mass number
Ans: equal to the sum of protons and neutrons
13). Isotope
Ans: what results when you change the number of neutrons in an element?
14). Atomic mass
Ans: weighted average of the masses of the isotopes of an element, gives the mass
of one atom of the element
15). Alkali metals
Ans: group 1 on periodic table
16). Alkali earth
Ans: group 2 on periodic table
17). Halogens
Ans: group 17 on periodic table
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