Chemistry

What element has an atomic number of 40?

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Which of the following is an element?
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What is the symbol used on the periodic table for the element Terbium?
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What was Avogadro's number?
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Which of the following best describes what water is?
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Which type of matter has definite volume but no definite shape?
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What is the chemical formula for table salt?
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What is the chemical symbol for lead?
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What kind of cell has a negative EMF and a positive Gibbs free energy?
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