How many valence electrons does a sulfate (S04-2) ion contain?

30

32

24

Explain some ways that human population impact our ability to fish for food

What's a metaloid, science

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What did scientists learn from the information found on seismographs? how deep the ocean is the structure of the Earth's crust the depth and density of Earth's layers the elements present in the interior

Determine the molarity of these solutions: (Assume that all are aqueous) a) 3.67 moles of Na₂SO₃ dissolved to make 3.04 liters of solution. b) 0.629 moles of Al₂O₃ to make 1.500 liters of solution. c) 4.783 grams of Na₂CO₃ to make 10.

Determine if the equation is endothermic or exothermic examples

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Name 2 islands formed as a result of the divergent boundary

Molar mass of calcium sulfate

Use the periodic table to determine the electron configuration for Ca and Pm in noble-gas notation Ca: [Ar]4s2 [Ar]4s1 [Ar]3s2 [Kr]4s2