Volume occupied by electrons Nucleus containing protons and neutrons- -10-4 Å- -1-5 Å– A Figure 2.10 The structure of the atom. A cloud of rapidly moving electrons occupies most of the volume of the atom. The nucleus occupies a tiny region at the center of the atom and is composed of the protons and neutrons. The nucleus contains virtually all the mass of the atom.

What is a atomic mass number

The nuclear atom model put forward by Ernest Rutherfort is based on Rutherford's observation of the scattering behavior of alpha particles sent onto a thin gold plate. Which of the following is incorrect? 3 - a) Most of the alpha particles are backscattered after hitting the gold plate. O B) Most of the positively charged alpha partieles passed through the gold plate without any seattering. NS) The nucleus, where the protons are together, occupies a very small volume. O D) The positively charged protons inside the atom are concentrated in the nucleus. O TO) Few of the positively charged alpha particles hit the gold plate and are scattered back at a large angle.

Recent Modules 7 of 106 Part A When a U nucleus is bombarded by neutrons (n) it undergoes a fission reaction, resulting in the formation of two new nuclei and neutrons. The 92 following equation is an example of one such fission process: Un Ba Kr + Enter the isotope symbol for the barium (Ba) nucleus in this reaction. Express your answer as an isotope. > View Available Hint(s) ΑΣφ Submit

The nucleus of an atom has a positive charge.

If you wanted to change the atomic number in the simulation, changing the number of which particle or particles would do that?

atoms which has the largest mass?

I3 write a hypothesis for how you think that decay constant is related to the concentration of the isotope.