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Across
2.Have some properties of Metals and some properties of Nonmetals.
6.Substances that can conduct Electric Current under some conditions and under some conditions can't.
7.Metals in Group one. These elements are very reactive.
8.Elements in Groups three through twelve are called _________.
9.Metals in Group two. These elements are reactive but not as reactive as the Group one metals.
10.Contain either one or two letters. Represent the elements name.
16.These elements do not ordinarily form compounds.
17.The average mass of all the isotopes of that atom.
18.The elements in a coumn. Also known as families.
19.Elements that are good conductors of Electronic Current and heat.
20.Alone in the upper left corner of the Periodic Table. Element with the simplest atoms.
Down
1.Elements are made, or synthesized, when nuclear particles are forced to crash into eachother.
3.An arrangement of elements showing the repeating pattern of their properties.
4.Made up of two atoms. Has to do with the Nitrogen Family.
5.Number of protons in the nucleus of an atom.
11.Only element in in Group fourteen.
12.Atoms that have the same number of protons and differnt number of neutrons are called ______.
13.Elements that lack most of the properties of a metal.
14."Salt forming"
15.Contains a series of different elements. From left to right, the properties of the elements change in pattern.

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