atoms
periodic table
100
who created atomic theory
john dalton
100
how many atoms are in oxygen?
8
200
can a microscope see atoms?
no
200
elements in the periodic table are arranged by?
atomic number
300
what are the main parts of an atom
protons, neutrons,electrons
300
true or false you will find the metals on the far right column of the periodic table?
true
400
what does the word atom mean?
the building blocks of all matter
400
how many element are in the periodic table?
100
500
who was the first person to develop the idea that atoms exist?
Democritas in B.C.E
500
true or false the rows of the periodic table are called periods
true
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