If you have an element with 46 protons and 44 electrons, the net charge of the element is

A. 0

B. + 2

C. - 2

D. not enough information

Nuclei with the same mass number but different atomic numbers are called isobars. Consider Ca-40, Ca-41, K-41 and Ar-41.

When A is changing at a rate of - 0.100 M⋅s-1, how fast is B changing?

Which of the following is an example of cramming?

Read the list of elements given below. He, Ne, Ar, Kr Which of the following about the elements is true? All of them are unreactive gases. All of them are reactive metalloids. He and Ne are unreactive gases and Ar and Kr reactive metalloids.

The two kinds of plates in the plate tectonics theory are the: A. Wegener B. continental C. sea floor D. rift

Calculate the gas constant, R, if 25.55 mL of hydrogen gas was collected at a barometric pressure of 0.987 atm and a temperature of 295 K. The vapor pressure of water at this temperature is 0.026 atm.

In order to change a solid to a liquid or a liquid to a gas, what is needed?

What conclusion can be draw about the heat of fusion of water from the heating curve? A) The potential energy of fusion represents a greater change of stored energy. B) Liquid water is stabilized by strong intermolecular forces between the molecules.

What is the ionic equation for HC2H3O2 (aq) + NH4OH (aq) = NH4C2H3O2 (aq) + H2O

How we can determine the correct technique to separete mixture