Boron is a metalloid. How many valence electrons does boron have?

A. 6

B. 3

C. 5

D. 4

One strategy to keep college tuition costs down is to attend a (n)

A polar bond results when two atoms have a significant difference in

What determines whether a precipitate forms when two solutions of ionic compounds are mixed?

How is the periodic law demonstrated in halogens

Why is Copper (II) Oxide "CuO" instead of "Cu2O"

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.