How many protons and electrons are contained in an atom of element 44

Explain why the salt magnesium chloride (MgCl^2) has the formula that is does. Could magnesium chloride also be written as Mg^2Cl?

True or False. 1. All gaseous mixtures are solutions. 2. Solid Solutions are common. 3. Vapor pressure of water is not affected by the amount salt added. 4. Alloys are examples of solid solutions. 5. Crystallization is a good way to purify solids. 6.

Each period in the periodic table corresponds to

With the correct choice of acid, the product (s) of the acid hydrolysis of n-methylbenzamide could be

A 118-ml flask is evacuated and found to have a mass of 97.129 g. when the flask is filled with 768 torr of helium gas at 35? c, it is found to have a mass of 97.171 g.

How was helium first discovered?

When is alpha particle emission most likely to occur? A. When the nucleus has more than 83 protons. B. When the ratio of neutrons to protons in the nucleus is too high to be stable. C. When the nucleus has a mass of more than 83 amu. D.

Researchers used a combustion method to analyze a compound used as an antiknock additive in gasoline. A 9.394 mg sample of the compound yielded 31.154 mg of carbon dioxide and 7.977 mg of water in the combustion.

The formula for binary ionic compound formed between cesium and fluorine

If the mass of a material is 76 grams and the volume of the material is 16 cm3, what would the density of the material be? g/cm3