Which of the following is not a part of Dalton's atomic theory?

A. All elements are composed of atoms.

B. Atoms of the same element are alike.

C. Atoms are always in motion.

D. Atoms that combine do so in simple whole-number ratios.

Carbon black in making printing ink is by oxidation of ?

Calculate empirical formula 24.5 g nitrogen 70 g oxygen

What was Johann Dobereiner's contribution to the development of the periodic table? He arranged the elements according to increasing atomic mass. He arranged the elements according to increasing atomic number.

What isotope remains after the alpha decau of uranium-238?

What is the name of the compound whose formula is n2o5

What are 3 properties of carbon?

A (1. pathogen 2. Germ 3. Bacterium) is an agent that causes disease. All (1. bacteria 2. fungi 3. Viruses) are pathogens.

Calculate the solubility (in g/l) of calcium fluoride in water at 25°c if the ksp for caf2 is 1.5 * 10-10.

Distinguish between the terms accuracy and precision. In general, explain why a precise measurement does not always guarantee an accurate result.

Does it require more energy to melt an ionic compound or dissolve it in water? It requires much more energy to melt it. It takes about the same amount of energy. It requires much more energy to dissolve it. Ionic compounds are insoluble in water.