Who created the forerunner of the modern periodic table?

Sodium metal and water react to form hydrogen and sodium hydroxide. If 8.43 g of sodium react with water to form 0.37 g of hydrogen and 14.68 g of sodium hydroxide, what mass of water was consumed in the reaction?

What is the mass of one atom of the element oxygen? (1 amu = 1.67 × 10-24 g)

A sailor circumnavigated the earth and covered 4,264,000 meters. Express this number in kilometers and in standard scientific notation.

Balance the chemical equation given below, and determine the number of moles of iodine that reacts with 20.0 g of aluminum.________ Al(s) + ________ I2(s) → ________ Al2I6(s)

Which of the following is the chlorite anion?

The thiosulfate ion is

If the melting point of aluminum metal is 1220°F, what is its melting point in Kelvin?

To the correct number of significant figures, an automobile traveling at 28 mi/h is traveling at ________ km/h (1 km = 0.6214 mi).

Most of the alpha particles directed at a thin gold foil in Rutherford’s experiment