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The elements which exist as single atom are called monoatomic elements. The elements which exist in atomic pairs bonded to each other are called diatomic elements. The elements which exist as groups of more than two atoms are called polyatomic elements. Chlorine (Cl2), Nitrogen (N2) and Hydrogen (H2) are diatomic gases. But sulphur exists as S8 and hence it is polyatomic. Selenium (Se8), Ozone (O3) and Phosphorous (P4) some other polyatomic elements.
19.86% of 145.12 1/2 × 65.12 = ? × 2.12
319.995 × 15.98 ÷ 4.002 - ? × 7.95 = 1679.89 ÷ 2.005
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
In a cyclic quadrilateral ABCD, angle A = 70 degrees and angle B = 100 degrees. What is the measure of angle C?
40.012% of 825.02 + 2620% of 59.89 = ?
1299.99 ÷ 20.21 = ? + 325.985 - (180 ÷ 6 × 24.03)
(363.89% of 224.98 – 319.86% of 134.94) ÷ ? = √(134.88 ÷ 15.25)
(11.99)2 + 171.16 + (3.33) 2 = ?2
56237.05 + 10616.99 - 137.25 + 1795.33 = ?