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Atoms and The Periodic Table

By: Anelisa Coronado
Across
Its atomic mass is rounded to 119.
A table of chemical elements.
Its atomic number is 18.
Found in the nucleus.
Equals protons+neutrons.
A column of elements in the periodic table.
Its symbol is I.
Are protons, neutrons, and electrons.
Positive charge.
Tells you the charge of an atom.
Down
Electrons on the outer most shell.
Its atomic number is 26.
A horizontal row of elements.
Equals the number of protons and electrons.
Its symbol is O.
Its atomic mass is rounded to 59.
Sodium's symbol
Introduced by Niels Bohr.
Center of the atom.
The basic unit of an element.