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periodic table

Teacher: periodic table
Across
The only metalloid in group 13
Changed the periodic table so that it was in order of increasing atomic number instead of mass
A molecule consisting of two atoms
The number of protons in an atom
This element is good for your bones and teeth
Can be made into shapes
Created the first periodic table
Ability of an object to transfer heat
There are 18 of these in the periodic table
Added the lanthanides and actinides on the bottom of the periodic table
Solid ones of these tend to be dull and brittle
Negative subatomic particles in an atom
Shorthand way to write the name of an element
Stable gases on the periodic table
Down
The only nonmetal that is liquid at room temperature
An object that helps explain ideas about the natural world
Particles found in an atom's nucleus
The only metal that is liquid at room temperature
A substance that cannot be broken down into any other substance by chemical or physical means
Good conductors
The most reactive metals in the periodic table
Au
Bananas are rich in this element
Substances that can conduct electric current under some conditions
One of the nonmetals in group 15
Deterioration of metal due to a chemical reaction
Shiny
The most reactive element of all
This element's symbol is W
Al