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THE HISTORY OF THE PERIODIC TABLE

Across
This scientist created the basis of the modern periodic table
A substance that cannot be broken into simpler substances by chemical means
The number of this sub-atomic particle can be determined by subtracting the atomic number from the mass number
These particles were shot at a thin sheet of gold leading to the discovery of the nucleus
Analytical technique that determines ions in a sample and their relative abundances
Columns on the periodic table are more commonly referred to as this
Atoms of the same element that have the same atomic number but differ in mass number
Each element on the periodic table as a unique ___________ spectra, like a finger print
This number is equal to the number of protons in an atom
Down
Most of the weight of an atom is located here
This scientist arranged elements into triads
This type of field is used to separate ions in a Mass Spectrometer
This scientist used electrolysis to discover elements (e.g. potassium, sodium, calcium)
Rows on the periodic table are more commonly referred to as this
This scientist arranged elements by increasing atomic weight (into octaves)
A substance containing atoms of different elements