Which scientist proposed the model of an atom as a nucleus surrounded by electrons?

James Chadwick

John Dalton

J. J. Thompson

Ernest Rutherford

Describe the difference between thermal energy and temperature.

2. what is the formula weight of (nh4) 2so4? 118 amu 116 amu 100 amu 132 amu

Magnesium bromide reacts with chlorine to form magnesium chloride and bromine. Balance the equation

If you have 100 grams of S8, how many moles of S8 is that

Only 5 questions! All you have to do is check my answers ... 1. A flask contains four gases: CH4, O2, C2H5, and N2. When the stopper is removed, which gas will diffuse the fastest? CH4 <--- O2 C2H5 N2 2. Which gas effuses 2.

Two clear solutions are placed in separate beakers. The first solution has a pH of 4, and the pH of the second solution is unknown. If the two solutions are mixed and the resulting pH is 5, the second solution must have

Based on its location on the periodic table, which element (s) have properties similar to N? Choose all that apply. * P C O Bi

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?

A scientist performs an experiment in which a radium-226 (Ra-226) atom decays into radon-222 (Rn-222). The scientist concludes that some energy must have been added to the system to cause this reaction to begin.

Which suitable method can be used to separate a mixture of sand and paraffin