Science Reading log Crossword

what is used to count radioactivity in elements?
what symbol is used for Helium?
what is the name of element 11?
a Gas element code Cl
what we breathe
one of two liquid elements (Hg)
Used to make things float ( He)
A metal, used in everyday things (Sn)
gives off rays of energy or particles, unstable bu breaking apart certain elements
when someone has been exposed to radiation for over 24 hours they may get what?
the name used for all of the elements grouped on a chart
a poisonous chemical that burns when exposed to air
The word for a substance as it came, not made from others, cannot be broken down
used to contain radioactive elements safely
used for explosives -element ( mixed with other items)
a distinct compound or substance, especially one which has been artificially prepared or purified.
what elements are most commonly found in
when an element or substance is safe i is a ....?.... element
the numbers of the elements is based on...?
how many elements are liquid? (q6)
elements are separated into what?