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Mrs. Salzman's Cycle 3: Week 17: Science: What are the Second Four Elements in the Periodic Table by Number, Element, Symbol, and Mass

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Across
The amount of matter in an object.
Eighth element on the periodic table, symbol O.
Chart organizing elements based on their properties.
Seventh element on the periodic table, symbol N.
Fifth element on the periodic table, symbol B.
Sixth element on the periodic table, symbol C.
Down
Short representation of an element using letters.
Basic building blocks of matter.
Numerical value.
A pure substance made up of only one type of atom.