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ScienceExam1-3

Vocab chap 1-3

QuestionAnswer
A tested, possible explanation of a natural event Scientific theory
A summary of an observed natural event Scientific law
A series of logical steps to follow in order to solve problems Scientific method
A measure of the quantity of matter in an object Mass
A measure of space, such as the capacity of a container Volume
The force with which gravity pulls on a quantity of matter Weight
Anything that has mass and occupies space Matter
A substance that cannot be broken down into simpler substances Element
Any matter that has a fixed composition and definite properties Pure substance
A combination of more than one pure substance Mixture
The change of a substance from a solid to a gas Sublimation
The mass per unit volume of a substance Density
A positively charged subatomic particle in the nucleus of an atom Proton
A neutral subatomic particle in the nucleus of an atom Neutron
A tiny negatively charged subatomic particle moving around outside the nucleus of an atom Electron
A horizontal row of elements in the periodic table; the time required for one full wavelength to pass a certain point Period
A vertical column of elements in the periodic table; also called a family Group
The number of protons in the nucleus of an atom Atomic number
The elements that are good conductors of heat and electricity Metals
The elements that are usually poor conductors of heat and electricity Nonmetals
The elements that are intermediate conductors of heat and electricity Semiconductors
The highly reactive metallic elements located in group 1 of the periodic table Alkali metals
The reactive metallic elements located in group 2 of the periodic table Alkaline-earth metals
The metallic elements located in group 3-12 of the periodic table Transition metals
The highly reactive elements located in group 17 of the periodic table Halogens
The unreactive gaseous elements located in group 18 of the periodic table Noble gases
The number of particles in 1 mol; equals 6.02x10(23)/mol Avogadro's constant
A ratio equal to one that expresses the same quantity in two different ways Conversion factor
Created by: hannastepanic
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