Which elements have isotopes with the same number of protons and neutrons

Dialysis is used to purify blood, sea water, and polluted drinking water. true or false?

are chemical and physical properties of the new substance the same or diffrent after a chemical reaction

Is magnesium a element compound or mixture

The harmonic law would suggest that Neptune will take how much time to orbit the Sun than Mercury?

In the following experiment, a coffee-cup calorimeter containing 100 g of H2O is used. The initial temperature of the calorimeter is 23.0 oC. If 2.

If 1000. mL of linseed oil has a mass of 929 g, calculate the density of linseed oil.

Why is pure water not a conductor of electricity? A. Pure water has no free ions. B. Pure water has many dissolved solids. C. Pure water has few dissolved solids. D. Pure water has many free ions.

Why do the pH scale generally range from 0 to 14 in aqueous solution?

For measuring the volume of a liquid, beakers are generally: more accurate than graduated cylinders less accurate than graduated cylinders equally as accurate as graduated cylinders always used when highly accurate measurements of liquid volumes are

Identify the strongest attractive force present in the pure substances shown: london forces, dipole-dipole, hydrogen bonding, ion-dipole, or ionic attractions.