The smallest class of the Periodic Table would be the semi-metals, or metalloids. The second biggest group would be the nonmetals. The largest group would be the metals.
Hydrogen (H) - with a single proton and electron.
Smallest atom is hydrogen Largest atom is Francium
The smallest element known to man is Hydrogen (H).
Uranium is not the largest in the actinoids family but also not the smallest.
Mendeleev's version of the Periodic Table was organized by increasing mass. The modern periodic table is now organized by atomic number.
Fluorine is the smallest halogen on the periodic table.
Lithium is the smallest element in the periodic table if Hydrogen and Helium are excluded.
It is fluorine.
Hydrogen
Hydrogen (H) - with a single proton and electron.
The smallest atom in the periodic table is hydrogen, not fluorine.
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Hydrogen
Hydrogen is the first, smallest, and lightest element. It is number 1 in the periodic table of elements.
The smallest diameter in the periodic table belongs to the element helium, as it has the smallest atomic radius due to its high nuclear charge and the attraction between the electrons and the nucleus.
francium
Smallest atom is hydrogen Largest atom is Francium