Which metals are attracted to electromagnets? Check all that apply.

-aluminum

-cobalt

-iron

-copper

-nickel

How many protons are in nitrogen-15?

A student placed 18.5 g of glucose (c6h12o6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-ml mark on the neck of the flask was reached.

When will the net enthalpy of formation of a solution (δhsolution) be endothermic?

A student placed a heated beaker into a basin of cold tap water and it cracked. Explain why the beaker cracked.

Which scientist proposed the "plum pudding" model of the atom?

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