Among the groups of elements listed below which have the same number of electrons in their highest occupied energy levels?

A. Li, B, C, F

B. Na, Mg, Al, S

C. K, Ca, Rb, Sr

D. N, P, As, Sb

Explain how iodine can be obtained from iodine-sodium chloride mixture

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What does a metal's position in an activity series indicate about the chemical properties of that particular metal?

What will the concentration of PCl5 be when equilibrium is reestablished after addition of 1.31 g Cl2? PCl5 (g) ⇆ PCl3 (g) + Cl2 (g) Original Equilibrium Mixture: 3.42 g PCl5 4.86 g PCl3 3.59 g Cl2 in a 1.00-L flask.

How many grams of koh are needed to prepare 400 ml of 0.350 m koh solution?

Describe your observations of the original solutions. Describe your observations when the silver nitrate was added to the sodium chloride solution.

A gas occupies 18.5L at stp. what volume will it occupy at 735 torr and 57°c?

When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers.

Which best identifies why the rusting of an iron nail in the presence of water and oxygen is in oxidation-reduction reaction

In the laboratory hydrogen gas is usually made by the following reaction:Zn (s) + 2HCl (aq) = H2 (g) + ZnCl2 (aq) How many liters of H2 gas, collected over water at an atmospheric pressure of 752 mmHg and a temperture of 21 Co, can made from 3.