If the nucleus is a few fm in diameter, the distance between the centers of two protons must be ≈2 fm.a. Calculate the repulsive electric force between two protons that are 2.0 fm apart.b. Calculate the attractive gravitational force between two protons that are 2.0 fm apart. Could gravity be the force that holds the nucleus together?

Q: In the Bohr model of hydrogen, an electron makes a transition from the n = 9 excited state to the n…

A: In the Bohr model of hydrogen, an electron makes a transition from the n = 9 excited state to the n…

Q: 3. A metal has a threshold wavelength of 500 nm. a. What is the binding energy of the outer electron…

A:

Q: What does the number of lines on the emission spectrum tell us about the electron decays for the…

A: Introduction: The atomic emission spectrum is the pattern of lines formed when it passes through the…

Q: an electron in a He+ ion is orbiting the nucleus at a distance of "0.265" A. what is the electron…

A: The distance of electron (radius of electron orbit) of the He+ ion r=0.265 A0=0.265×10-10 m The…

Q: A hydrogen atom has its electron in the n = 1 state. (a) How much energy would have to be absorbed…

A:

Q: At a very short range, the potential energy between electrons and nuclie in atoms can be expressed…

A: Force due to conservative force is the negative gradient of potential energy.

Q: While studying the spectrum of a gas cloud in space, an astronomer magnifies a spectral line that…

A: Write the expression for the Zeeman shift. Here, m represents the mass of electron, c represents…

Q: (a) How many electrons can be in the n=4 shell?(b) What are its subshells, and how many electrons…

A: Formula of number of electrons can occupy in given shell is as follows: Ne-=2n2…

Q: Robert Hofstadter won the 1961 Nobel Prize in Physics for his pioneering work in studying the…

A:

Q: An alpha particle is made up of two neutrons and two protons in a bound state. Consider a stationary…

A: An alpha particle is actually H24e nucleus. It consists of two protons and two neutrons. Therefore,…

Q: A hydrogen atom initially in the n = 2 level emits a photon and ends up in the ground state. (a)…

A:

Q: Consider the gold isotope 197Au.a. How many electrons, protons, and neutrons are in a neutral 197Au…

A: a) The atomic mass of gold is 197 and the atomic number of the gold is 79. The number of proton is…

Q: A hydrogen atom has its electron in the n = 2 state. (a) How much energy would have to be absorbed…

A:

Q: A hydrogen atom has its electron in the n = 3 state. (a) How much energy would have to be absorbed…

A:

Q: Consider the lead isotope 207 Pb, Part A How many electrons, protons, and neutrons are in a neutral…

A:

Q: The ionization energy of mercury is 10.4eV. What is meant by (i.) electron volt (eV) (ii.)…

A:

Q: • An electron drops from the L shell to the K shell and gives off anX-ray with a wavelength of…

A: Equate the difference in energy levels to the energy of X-ray

Q: (a) Construct an energy-level diagram for the He+ ion, for which Z = 2, using the Bohr model. (b)…

A:

Q: A laser with a power output of 2.00 mW at a wavelength of 400 nm is projected onto calcium metal.…

A: (a) E=hcλ  =6.626×10-34×3×108 ms400×10-9 m  =4.962×10-9No. of electrons ejected;=2×103J/s4.962×10-9…

Q: (a) What voltage must be applied to an X-ray tube to obtain 0.0100-fm-wavelength X-rays for use in…

A: The energy of the X-ray can be given using the following equations Substituting the values give,

Q: Consider the lead isotope 207Pb.a. How many electrons, protons, and neutrons are in a neutral 207Pb…

A: (a) The atomic number of 207Pb is 82. So, the number of protons in 207Pb is 82. The number of…

Q: a) Find the energy necessary to raise an electron from states n = 4 to n = 5 in the hydrogen atom.…

A:

Q: (a) An aspiring physicist wants to build a scale model of a hydrogen atom for her science fair…

A: Diameter of nucleus is approximately 10-15 m and diameter of atom is 10-10 m The ratio of diameter…

Q: The Lyman series comprises a set of spectral lines. All of these lines involve a hydrogen atom whose…

A: Since you have asked multiple question ,we will solve the first three question for you. To get the…

Q: (a) List all possible sets of quantum numbers (n, l, ml , ms) for the n = 3 shell, and determine the…

A: a)

Q: What is the magnitude of the electric field at a distance of 0.1 nm from a thorium nucleus? I have…

A: Given: The distance from the nucleus of the thorium is 0.1 nm.

Q: The radius of a calcium atom is approximately 0.23 nm. What is the magnitude of the ionization…

A: This question can easily be solved by using the concept of bohr model and ionization energy .

Q: Q.2. Calculate the ground-state energy of the hydrogen atom using SI units and convert the results…

A: Introduction: The ground state energy is defined as the lowest allowed energy level and it has zero…

Q: excited nydrogen atoms need less energy to oxidize than normal ones. It is in the ground condition…

A:

Q: Some of the energy levels of the mercury atoms are shown in figure below. Energy (eV) 1.6 -10,4…

A: Given From the energy level diagram, E1=-10.4  eVE4=-1.6 eVE∞=0 Find the amount of energy required…

Q: The kinetic energy of an electron in a particular Bohr orbit is 135 10 19 . × . − J (a) Which Bohr…

A: A situation is given, in which Kinetic energy of electron in a particular state is given; K.E of…

Q: Nuclear radii may be measured by scattering high-energy electrons from nuclei. (a) What is the de…

A: Given:Energy, E = 172 Mev = 172×106 V

Q: A hydrogen atom has its electron in the n = 1 state.  (a) How much energy would have to be absorbed…

A: Given data as per question n = 1 (a)energy transfer in a hydrogen atomE=13.6n2=13.612E=13.6eV

Q: The radius of a calcium atom is approximately 0.23 nm. What is the ionization energy?

A: The expression for the nth ionization energy is, En=Z2e28πε0r n2 The atomic number of Calcium atom…

Q: The image represents the gaps between allowed energy levels for electrons. Which model best…

A: Explanation-      when electrons are in the different shells of an atom or artificial atom, it…

Q: Unreasonable Results(a) What voltage must be applied to an X-ray tube to obtain 0.0100-fm-wavelength…

A: X-ray tubes are those tubes that emit X-rays when sufficient voltage is passed through them. X-rays…

Q: (a) A hydrogen atom is initially in the ground state. How much energy (in ev) is required to ionize…

A: The Ionization energy is the amount of energy required to remove an electron from the most loosely…

Q: Which of the following would be closer to the nucleus? a. The ground state (n = 1) of an electron…

A: The size of the atom increases with increase in the number of electron shells.

Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.