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The Periodic Table

question 1 of 1 Grade: Eleven - G11

Q: Which element is in period 3, group 1 of the periodic table?

Did You Know?

Using Pythagorean identity: cos²θ = 1 - sin²θ = 1 - (25/169) = 144/169. Since θ is acute, cos θ = 12/13

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Did You Know?

Using Pythagorean identity: cos²θ = 1 - sin²θ = 1 - (25/169) = 144/169. Since θ is acute, cos θ = 12/13

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