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15 Cards in this Set

  • Front
  • Back
What is a heterogeneous mixture?
not having a uniform composition throughout.
What is a pure substance?
A fixed composition and differs from a mixture. An element.
What is an example of a heterogeneous mixture?
kool-aid, salad
What is the 18th group on the periodic table called?
Noble gases
what group number are the halogens?
17
What are valence electrons?
Electrons in the outermost shell
What is the sum of the oxidation numbers?
8
What is a chemical property?
The ability of a substance to undergo a change that transforms the substance
What is an example of a physical change?
Cutting hair, freezing water
What is an electrolyte?
A substance that is dissolved in water to make an electric current
What is the charge of the alkaline metals?
+1
What group in the periodic table are the most reactive non-metals?
Halogens
What is the best way to dilute acids?
Slowly add water
Name 2 examples of proper attire for a lab.
Hair up, goggles, no loose clothing, gloves, apron, closed toed shoes, etc....
What is the neutral solution of a pH?
7