Science Crossword

Something that is shiny and strong and is used most of the time
a yellow precious metal, the chemical element of atomic number 79, used especially in jewellery and decoration
a substance which has a molecular structure built up chiefly or completely from a large number of similar units bonded together
an element or substance that is not a metal.
a table of the chemical elements
the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom
hard but liable to break easily.
unable to bend or be forced out of shape; not flexible.