Briefly explain the importance of Mendeleev's work with the periodic table

If an atom is neutral then the number of electrons is equal to the number of

Ethanol is a common laboratory solvent and has a density of 0.789 g/mL. What is the mass, in grams, of 139 mL of ethanol?

You have 0.5 l of air at 203 k in an expandable container at constant pressure. you heat the container to 273 k. what is the new volume?

The chemical formula for table sugar is C12H11O22. What can you tell from this formula? There are 22 protons in an oxygen atom. There are 12 electrons in a carbon atom. The ratio of oxygen atoms to hydrogen atoms in a molecule of sugar is 2 to 1.

The vapor pressure of 25 milliliters of water at 25 degrees celcius will be the same as

Which metal can replace Cr in Cr2O3

Which of the following is used for chemical symbols today? a. drawings c. letters b. icons d. numbers

6 features of a spider

What two forces are acting on the balloon when it is stuck to the wall and which is stronger?

In the process of electrolysis, current can flow through a liquid because A. water molecules become negatively charged. B. hydrogen is electrically neutralized in the solution. C. negative ions are attracted to the anode. D.