Who was the architect and first artist whose name was recorded?

Determine the number of protons, neutrons, and electrons in the following: (_29^65)X

An element has 3 naturally occurring isotopes with the following masses and abundances. Calculate the atomic mass of the element: 47X: 46.9217 amu has an abundance of 38.11% 48X: 47.9501 amu has an abundance of 22.39% 49X: 49.0124 amu

How many protons does the As3+ ion possess?

Five students independently measured the density of water. Their values were: and . The literature value for the density of water at 25°C is . The group of results can be classified as:

A student performs an experiment to determine the density of a sugar solution.  She obtains the following results for 4 trials:  1.11 g/mL. 1.81 g/mL, 1.95 g/mL, 1.75 g/mL.  How should she report her final results, including the uncertainty of her measurements?

Identify the element from its atomic notation: 〖_48^112〗X

What prefix multiplier is most appropriate for reporting a measurement of 7.92 * 10-9 m?

What is the mass of 6.78 * 1024 molecules of SO2?

Rutherford proposed the ___________________.