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32 Cards in this Set
- Front
- Back
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________ __________ are statments of relationships based on human perceptions of natural phenomena.
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Scientific law
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Scientific Knowledge is ?
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Is cumulative
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The methods that scientist use to solve problems in the laboratory?
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Probaly cannot solve all human problems.
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The use of scientific discoveries?
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is a matter for the people to decide
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The future direction of science?
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cannot be predicted with great accuracy
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The fact that scientist and artist are often unable to communicate with each other.
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is a loss to both art and sciene
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The prefix "Kilo" means
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one thousand
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of the following which is the smallest.
500 mm 5.00 m .005 km .002 mi |
500 mm
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The meter was originally based on the?
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earth
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The prefix that does not match the number is
centi- 10e-1 Kilo- 10e3 Milli- 10e-3 micro- 10e-6 |
Centi-
should be 10e-2 |
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A yard equals
1.1 m. 30.48m. 39.37 m. .92m. |
.92m.
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The number of grams in 2000 lbs
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9.068 x e5
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The product of (1.3 x e-4) x (6.00 x 10 e5) is
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7.80 x e1
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A proper unit for designating volume is
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mL.
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The results of dividing (8 x e3) by (2x e-5) is
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4 x e8
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the number 4.36 x e-4 is
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.000436
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When the electron of a hydrogen atom is in the energy level n=2, we say that
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it is in an excited state.
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The atomic number of gold is 79 and the mass number of one of its isotopes is 197. the number of neutrons is.
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118
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Elements in the same group in the periodic table
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Have simular chemical properties
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the principle that a maximum of two electrons is allowed in any orbital is known as
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The Pauli exclusion principle
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The total electron capacity of the energy level n=4 is
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32
formula is 2(n^2) |
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All are located in the nucleus of atoms except.
A. protons B. electrons C. neutrons D. nucleons |
B. electrons
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An element has eight protons and seven neutrons. The element is.
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Oxygen
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Neutral atoms of
117 119 Sn and Sn differ in |
the number of neutrons in the nucleus.
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The atomic weight of potassium is 39.1g We can conclude that.
A. an atom of potassium has a mass 39.1g B. potassium is a mixture of different masses, the average of which is 39.1g C.every atom of potassium has a mass, of 39.1g D. potassium is an isotope of 39Y |
B. potassium is a mixture of different masses, the average of which is 39.1g
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Experimental support for the arrangement of electrons in a distinct energy levels is based primarily on
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Atomic Spectra
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Tells what always happens
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Scientific Law
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Tells why something happens
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Scientific Theory
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How close we are to the true or correct answer
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Accuracy
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How close multiple measurements of the same thing are to each other .
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Precision definition 1
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How many Significant digits may be honestly reported for a measurement
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Precision definition 2
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Learning about nature using controlled experiments rather than relying on past authority
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Science
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