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100
A substance that can't be broken down any further.
What is an element?
100
Negatively charged particles in an atom.
What is an electron?
100
Microscope used to see atoms.
What is an electron microscope?
100
Elements that have properties of both metals and not metals.
What are semi metals?
200
The smallest particle of an element that still has the properties of the element
What is an atom?
200
About 50 of the 100 elements in the periodic table are this.
What is common?
200
Guy that came up with the periodic table of elements.
What is Dmitri Mendeleyev
200
Another name for semi metal.
What is a metalloid?
300
Structure at center of atom.
What is the nucleus?
300
The most common element and the building block of life.
What is carbon?
300
How elements are arranged in the periodic table.
What is the atomic number.
300
Cannot conduct electricity, don't scratch or bend, easily broken.
What are non metals?
400
Small positively charged particle.
What is a proton?
400
A substance made of two or more elements chemically joined.
What is a compound?
400
The atomic number is this
What is the number of protons in the nucleus?
400
Hardly ever combine with other elements
What are noble gases?
500
A particle in an atom that has no charge.
What is a neutron?
500
Three properties of elements.
What are conduct electricity, hardness, and density.
500
Can be bent, scratched, are shiny, can carry electricity.
What are metals?
500
Group of two or more atoms that are chemically joined..
What is a molecule?