Chemistry Flashcards
What is a Matter
A substance which occupies space
What is a Element
A pure substance which cannot be decomposed into substances by a chemical reaction
What are the Categories of Elements
(1) Metals and (2) Non-metals
What is a Compound
A pure substance composed of two or more elements combined in definite proportions
What is a Density
The ratio of an object’s mass by volume
What is the conversion from Celsius to Kelvin
273.15
What is the conversion from Celsius to Fahrenheit
Thrity two plus one and two fifths of the Celsius degree
What is the Celsius freezing point of water
0° C
What is the Fahrenheit freezing point of water
32° F
What is the Kelvin freezing point of water
273.15 K
What is a Mixture
A matter consistence of two or more pure substances
What is a Pure Substance
A matter with the same composition which cannot be separated by physical reaction
What are the Types of Pure Substances
(1) Elements and (2) Compounds
What are the Types of Mixture
(1) Homogeneous and (2) Heterogeneous
What is a Solution
A homogeneous mixture
What is a Homogeneous Mixture
A mixture with a uniformity composition
What is a Heterogeneous Mixture
A mixture without a uniformity composition
What is a Atom
The smallest unit of a pure substance
What are the Catagories of Physical States
(1) Solid (2) Liquid and (3) Gas
What is a Physical Property
A characteristic which can be observed or measured without changing the composition of a substance
What are Examples of Physical Property
(1) Color (2) Odor (3) Physical State (4) Mass (5) Volume (6) Density (7) Temperature
What is a Molecule
The discrete arrangement of two or more atoms bounded
How are Pure Substances commonly represented
(1) Element Symbols and (2) Chemical Formulas
What are the Classifions of Substance Change
(1) Physical and (2) Chemical
What remains unchanged in a Physical Change
The identity of the substance
What are the Determinations of Chemical Properties
(1) Compositions and (2) Chemical Changes
What is an Object’s Energy
A combination of kinetic and potential energy
What is a Energy
The capacity to do work or to transfer heat
What are included in Scientific Methods
(1) Theories (2) Observations (3) Hypotheses and (4) Laws
What is a Hypotheses
A tentative explanation for the results of experiments
When are Laws resulted
When observations appear to have universal validity
What is a Theory
A supposition explanation of a law
What is a Chemical Change
The rearrangement of atoms which form new substances
What is involved in substance changes
Energy
What changes form and transfers heat
Energy
What is a Observation
A scientific method designed for carefully controlled experiments
What is Data Collection
An observation
What is a Scientific Method
What is a Chemical Reaction
