In the modern periodic table,elements are listed in order of increasing atomic number rather than increasing relative mass.
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Q21: Mendeleev's early periodic table predicted the existence
Q22: The relative amount of each different isotope
Q23: The atomic mass of individual atoms of
Q24: The atomic number of nitrogen is 14.01.
Q25: An element is discovered that is a
Q27: All carbon atoms have exactly 6 protons.
Q28: Halogens form anions with a 1- charge.
Q29: Metals are located on the left side
Q30: The elements within a group on the
Q31: Aluminum is one of the most commonly
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