ATOMS Crossword
This printable crossword puzzle on the topic of Elements & Periodic Table has 16 clues. Answers range from 3 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Description
a substance that cannot be broken down into simpler substances
the smallest article of an element
a particle that is contained in an atom outside of the nucleus
a particle that is contained in the nucleus of an atom and has a positive charge
a particle that is contained in the nucleus of an atom and has NO charge
an atom that has gained or lost electrons and thus has a charge
atoms of an element with different numbers of neutrons in their nucleus
the number of protons an atom has
the number of protons and neutrons in the nucleus of an atom
1808 proposed that atoms of different elements can have similarities, but are not completely identical
1897 discovered the electron; plum-pudding model
1909 discovered the nucleus and protons
1913 discovered electrons move around nucleus in circular, distinct paths
1932 discovered neutrons, student of Rutherford
positively charged ion due to losing electrons
negatively charged ion due to gaining electrons
