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What are elements? Which elements are common?

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Answer:

elements are an essential or characteristic part of something abstract.

Step-by-step explanation:

Each element is assigned a symbol - H for hydrogen. You should learn the symbols for the eight most abundant elements in the Earth's crust (Oxygen (O), Silicon (Si), Aluminum (Al), Calcium (Ca), Iron (Fe), Magnesium (Mg), Sodium (Na), and Potassium (K).

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