Match the element with its number of valence electrons. Column A 1. Boron : Boron 2. Carbon : Carbon 3. Fluorine : Fluorine 4. Sodium : Sodium Column B a. 4 b. 1 c. 3 d. 7

What determines how fast a substance will dissolve

If the [OH] = 10^-4 then what is the pH of the solution?

How many moles of cl - ions are needed to completely combine with 0.25 moles of mg 2 ions?

The density (mass/volume) of aluminum is 2.70x10^3 103 kilograms per cubic meter (kg/m3). What is the mass of an aluminum cylinder that has a volume of 1.50 m3?

Sort the sentences based on whether the attributes they describe belong to planets or an object that isn't a planet.

Is sidewalk cement an element or a compound?

1.4 Explain why it is important to support individuals to challenge information about services that may present a barrier to participation

Which describes energy changes during nuclear fission? A very large amount of energy is produced from a tremendous mass. EEUU A very large amount of energy is produced from a very small mass. G .

A 0.75mol calcium carbonate (CaCO3) pellet has what mass?

The pH of the acid in the stomach is 2. When a person has heartburn, the acid in their stomach is coming up the esophagus (lower throat) and burning the lining of the esophagus. Why would a person take an Alka Seltzer tablet for heartburn?