How is hydrogen in heavy water different from hydrogen in normal water? A. The hydrogen atoms in heavy water have an extra proton in the
nucleus.
B. The hydrogen in heavy water is radioactive.
C. The heavy water molecules contain 3 hydrogen atoms instead of
2.
D. The hydrogen atoms in heavy water have a neutron in the nucleus,
doubling the mass.

the volume increases

more infor would

a lot

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.