Isotopes of an element will always have the same A. number of protons. B. number of neutrons. C. number of electrons. D. mass.

A mixture of iodine and sulphur crystal can be separated by treating with what?

Write 2 difference between physical and chemical change. write an example in which both take place

Which does not affect the gravitational potential energy of an object? 1. mass 2. height 3. speed 4. acceleration due to gravity

Which of the following is one way that nuclear reaction different from chemical reaction

Which theme of biology explains the modification of an organism's parts to adapt to its habitat?

Given the reaction 2NaOH + H2SO4 = Na2SO4 + 2H2O, what is the total number of grams of NaOH needed to react completely with 196 grams of H2SO4

The mass flow rate of gasoline leaving a refinery is 1610 kg/min. The specific gravity of a gasoline is 0.700. A retail gasoline pump is able to fill a 20.0 gallon automobile tank in 1.80 minutes.

Calculate the solubility of cux (ksp=[cu2+][x2-]=1.27*10-36) in a solution that is 0.190 m in nacn.

An atom has seven valance electrons which element could have this type of atom

How is the ocean important to human survival? restate the question