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periodic table crossword

Across
Properties between metals and solid metals
Atoms having the same # of protons but different # of neutrons
Atomic # of 89 and mass of 222
Vertical column of elements
Has elements 89-103
Smallest particle that has properties of an element
Comprises the 15 metallic elements
Have a negative charge
Number of protons in a nucleus
Horizontal row of elements
Any possible energies an electron has
Down
Protons and neutrons make the....!
Arrangement of chemical elements
Electron in the outermost energy level
Atomic number of 11
Neutral charge
Directed the Geiger Marsden experiment
Elements that are good conductors of heat and electricity
Properties of elements tend to repeat in a regular pattern...
Center of atom