Chemistry is a Physical Science
What is the definition of science?
The knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested
What is the difference between intensive and extensive properties?
Intensive properties do not depend on the amount of matter present, while extensive properties do depend on the amount of matter present
What is another name for the groups in the periodic table?
Families
How much of the PT is made up of metals?
80%
Mixtures are not
Chemically bonded
What is technological development?
The production and use of products that improve our quality of life
What are endothermic and exothermic properties?
Endothermic systems absorbs heat and exothermic systems release heat
What do nonmetals form and what is the charge?
The create anions that are negatively charged
What are the different ways you can separate mixtures?
1. Sorting
2. Filtering
3. Magnetism
4. Chromatography
5. Density (centrifuge)
6. Distillation
Solid>Gas
Gas>Liquid
Liquid>Solid
Sublimation
Condensation
Freezing
The first scientists were
Alchemists
What is composition?
What matter is made of
What is the Periodic Law?
The properties of elements repeat every so often
The formula for density is
MASS/VOLUME
Some substances dissolve more easily than others
What are the 6 branches of chemistry?
Organic, Inorganic, Analytical, Physical, Theoretical, and Biochemistry
What is the difference between homogeneous and heterogeneous mixtures?
Homogeneous mixtures are uniform in composition. Heterogeneous mixtures are not uniform.
What are the metalloids?
Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, and Polonium
What is an alloy?
A homogeneous mixture of metals
Physical science
What is a chemical?
Any substance that has a definite composition
What is plasma?
Physical state of matter which atoms lose most of their electrons
What are the properties of metals?
Lustrous (shiny), ductile, malleable, good heat and electricity conductors
All pure substances have a
Chemical formula
Atom