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Mrs. Salzman's Cycle 3: Week 16: Science: What are the First Four Elements in the Periodic Table by Number, Element, Symbol, and Mass?

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Across
The amount of matter in an object.
Numerical value.
Chart organizing elements based on their properties.
Basic building blocks of matter.
Third element on the periodic table, symbol Li.
Down
Short representation of an element using letters.
A pure substance made up of only one type of atom.
First element on the periodic table, symbol H.
Fourth element on the periodic table, symbol Be.
Second element on the periodic table, symbol He.