An atom's mass number is 210 and its atomic number is 85. How many neutrons does the atom have

Why does a solution of acid and sodium thiosulfate go cloudy

Which statement is true about an empirical formula? A.) It is the true ratio of atoms in a formula unit. B.) It is the simplest ratio of atoms in a formula unit. C.) It represents the true molecular mass of a chemical formula. D.

What would happen to the size of a helium balloon as it moves higher into the atmosphere (pressure decreases with altitude) ? And why you would hear air rushing out from a bottle of non-carbonated water that has been sitting out on a hot day?

Which element does not contain any neutrons

Why do the inner walls of a vacuum flask have a silver coating?

What is the concentration of O2 (g), in parts per million, in a solution that contains 0.008 gram of O2 (g) dissolved in 1000. grams of H2O (l) ?

Give the mass percent of carbon in C14H19NO2?

Blank is the theory that explains how large pieces of earths outermost layer move and change shape

Describe the energy transformation that occurs in a clock

Electronegativity tends to tends to increase from left to right across a row., becasue