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the scientific study of the composition, structure, and properties of matter and the changes that matter undergoes and the energy associated with it
a substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of this have the same atomic number
an arrangement of the elements in order of the atomic numbers (# of protons) such that elements with similar properties fall in the same column, or group
a vertical column of elements in the periodic table; the elements in it share chemical properties
this branch of chemistry studies non-organic substances; often organic substances bonded to metals
this branch of chemistry studies the properties and changes of matter and their relation to energy
this branch of chemistry involves the identification of components and the composition of materials
this branch of chemistry uses math and computers to understand principles behind the observed chemical behavior and to design and predict properties of new compounds
the number of waves that pass a specific point during a specified time period (per second, usually)
a chart that displays all possible combinations of wavelengths and frequencies for electromagnetic radiation
This is a thin sheet of plastic with thousands of tiny grooves on the surface. It replaced the prism in spectroscopes.
a fingerprint for a specific element is called a(n) _________. It is the specific color(s) of light given off by a specific element.
mass of the middle element
The masses of the smallest and biggest element in each triad averaged to be the ___ __ ___ ____ _____.
Who proposed a method for finding and reporting elements' atomic masses systematically?
law of octaves
The system of arranging elements in seven rows of seven elements, in increasing atomic mass order, with the 1st and 8th elements having similar properties, was called the ________.
The former ____ ___ says that physical and chemical properties are a periodic function of the element's atomic mass.
Sir William Ramsay, John Strutt
Which two men worked together and found Argon and most of the other noble gases?
The modern ____ ____ says that physical and chemicals properties are a periodic function of the element's atomic number.
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