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Periodic Table crossword

Tap a square and type. Tap it again to switch direction.

Across

2 Horizontal row on the chart
4 ___ metals: the very reactive first column
6 Gas that makes balloons float
7 Element we breathe, symbol O
8 Symbol Na, one half of table salt
10 Rightmost column, famously unreactive
12 Element number one, lightest of them all
14 Element once coiled inside light bulbs

Down

1 Metal with symbol Fe, needed in your blood
2 Positive particle whose count gives the atomic number
3 Group including fluorine and chlorine
5 Same element, different neutron count
9 Russian chemist who arranged the elements into rows
11 Only metal that is liquid at room temperature
13 Symbol Au, prized yellow metal

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