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Unit 8 Review

Across
C is the symbol for which element
Tea is an example of which type of mixture?
The average mass of an atom
Matter is neither lost or gained during a chemical reaction
The ability of a metal to be drawn out into thin wires is a
A(n) ________ is a substance in which all the atoms in it are alike
If using a microscope allows you to see substance in a mixture, that mixture is
Atoms consist of a positively charged center called a(n)
Gasoline burns in an engine to form carbon dioxide and water.
Water is an example of
Down
Believed that matter was uniform throughout
The _____ is a chart created by Scientists to organize the elements according to repeated changes of the properties.
The number of which type of particle determines the identity of an element
The mass of a proton is measured in
Group 18 is said to be
is a method of representing atoms and the electrons in their outer energy levels.
Muddy water is an example of a
Which atomic particles are NOT hypothesized to be made up of smaller particles?
formed the first periodic table
Atoms with Different mass, same atomic number
Scientists have broken down protons and neutrons into smaller particles called
Democritus believed that the universe was made of empty space and