How many unpaired electrons are present in the ground state of an atom from each of the following groups?   (a) 3A(13) (b) 4A(14) (c) 7A(17) (d) 5A(15)

Q: Give the possible term symbols for the following electron configuration: 2 15 25 2p O a. Pa2 O b.…

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Q: IF an unknown element has an atomic mass of 119 and a quantum number sequence of 5, 1, 0, +1/2…

A: Given that -  Atomic mass of element = 119  And, the sequence of all quantum numbers is = 5,1,0,+1/2…

Q: Which of the following informatiön 18 not correct about principal quantum number (n) :- (1) As value…

A: The address of an e- in an atom is described by the set of four quantum numbers n, l, m, s. These…

Q: Given the valence electron orbital level diagram and the de- scription, identify the element or ion.…

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Q: Which of the following is a correct electron configuration of scandium (Sc) atom? Group of answer…

A: The atomic number of Scandium is 21. Hence there are 21 electrons in the Sc element. Since the first…

Q: Which of the following types of electrons penetrates most toward the nucleus and therefore has the…

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Q: 7.21 Specify the group of the periodic table in which each of the following elements is found: (a)…

A: Electrons are filled in this order The outer electron configuration of the elements in group 1A is…

Q: 49. Write the full electron configuration (1s22s², etc.) for each of the following elements. a.…

A: The electron configuration of any element describes that how the distribution of Electron in its…

Q: State whether each of the following attempts to write an electron configuration is correct or not.…

A: The given configuration is not correct . Electrons filling in orbitals are done by afbau's principle…

Q: Which among the following represents the subshell with n=5 and I=3? 5p 5d 4d 5f

A: Principle Quantum no = n= 5 Orbital Angular momentum Quantum no = l = 3 Subshell = to be determined…

Q: 24. What is the energy change (in J) and wavelength (in nm) of light emitted when an electron…

A: The wavelength of hydrogen is given as; 1λ=R1nf2-1ni2 where, R = 10973731.6m-1

Q: Without referring to Figure 6.25, write the electron configuration for an arsenic atom (Z = 33) in…

A: Electronic configuration indicates the arrangement of electrons around the atomic nucleus. 'As' is a…

Q: Consider a helium atom(m=6.6m10^-27 kg) that is confined to mobility along a line with a length of…

A: Given: mass of helium atom = 6.6×10-27 kg speed = 1500 m/s Length = 12 Ao

Q: Predict the ionization energy of Li2+ given that the ionization energy of He+ is 54.36 eV.

A: The ionization energy He+ is 54.36 eV The electronic configuration of Li2+ is 1s1 The electronic…

Q: How many unpaired electrons are present in the ground state of an atom from each of the following…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: (1) What is the element with an electron configuration of 1s22s22p 3s²3p54s²3d5? (2) What is the…

A: Identify the element by using its electronic configuration ?

Q: 4. In a given atom, what is the maximum number of electrons that are allowed to have the following…

A: There are four different quantum numbers, Principal quantum Number (n), lethal quantum Number (l) ,…

Q: 2. Given the valence electron orbital level diagram and the description, identify the element or ion…

A: a. The valence shell electronic configuration is: 3s23p4 Here, the last electrons enter into the p…

Q: 6.90 Define the following terms and give an example of each: lanthanides, actinides.

A: The given terms lanthanides and actinides has to be defined.

Q: What is the e/m ratio of an electron?

A: e = charge of an electron, m= mass of electron  J.J.Thomson was able to determine the e/m ratio by…

Q: 4. Deuterium is an isotope of hydrogen with 1 proton and 1 neutron in its nucleus (deuterium = ²H).…

A: Q - Deuterium is an isotope of hydrogen with 1 proton and 1 neutron in its nucleus (deuterium = 2H).…

Q: 13! Which of the following statements is correct about the effective nuclear charge (Zet)? A) Zeff…

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Q: (1) What is the element with an electron configuration of 1s²2s 2p°3s²3p°4s²3d$? (2) What is the…

A: Write the element by using their electronic configuration ?

Q: l= 1, ml, = 0 (b) n = 2, l= 1, ml, = -1 (c) n= 3, l= 1, ml, = 0, ms = ½

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Q: Calculate the temperature at which the wavelength of a neutron is 1.36 Å. 4.0 K

A: The answer is given below

Q: An electron moving at 2.90X10T m/s is found 7.04x10- n what is the mass of the to have á wavieleng…

A: The velocity of the electron, v = 2.90×104 m/s Wavelength of the electron, λ = 7.04×10-9 m Mass of…

Q: 7.127 Explain why it is more difficult to ionize a fluorine atom than a boron atom.

A: Answer

Q: What is the maximum number of electrons in each of thefollowing energy levels?a. n 5 1 b. n 5 2 c. n…

A: Given energy levels, a. n = 1 b. n = 2 c. n = 3

Q: What is the identity of the element with the following electron configuration:  1s22s22p63s23p1

A: Given that, the electron configuration of the element is---- 1s2 2s2 2p6 3s2 3p1 So, the element…

Q: How many unpaired electrons are present in the ground state of an atom from each of the following…

A: a. In ground state 2A group, there is no unpaired electron. b. In ground state 5A group, there are…

Q: Which of the following ground state electron configuration represent a violation of the Aufbau…

A: Aufbau principle: Electrons in the ground state of an atom are filled in the lowest energy orbitals…

Q: Explain the variation in the ionization energies of carbon, asdisplayed in this graph:

A: The atomic number of carbon is 6. Therefore, the electronic configuration of carbon is,

Q: 1. What is the cause of the atomic emission spectrum of an element?

A: Given: To give the causes of atomic emission spectrum of an element

Q: (1) What is the element with an electron configuration of 1s²2s²2p°3s'3p°4s°3«®? (2) What is the…

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Q: DIRECTIONS: Write the noble gas configuration and identify the quantum numbers of the following…

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Q: Which of the following energy-level changes for an electron is most energetic? 3 → 2 3 → 1 6 →1 4 →…

A: The energy of electron in any level n for any atom with atomic number Z is given y  En = -2.18 X…

Q: Consider a helium atom(m=6.6m10^-27 kg) that is confined to mobility along a line with a length of…

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Q: Which of these spheres represents F, which represents Br,and which represents Br-?

A: We are given the elements F and Br they belong to the group-17 and they are known as the halogens.…

Q: State whether each of the following attempt to write an electron configuration is correct or not.…

A: Given :-  a) 1s22s2p23s2 b) 1s22s23s23d10  To determine :  Whether the given electron configuration…

Q: An atom has an electron configuration of 1s22s22p6. Which of the following are possible quantum…

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Q: Which subshell has the lowest energy? Group of answer choices a. 6s b. 5s c. 4d d. 5p

A: According to Aufbau's Principle, the subshell which has the lowest lave of (n+l) has the lowest…

Q: How many unpaired electrons has the element Selenium (Z=34) in its ground state? * 3.

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Q: (Q70) Identify all of the following to which the electron configuration shown her could describe: 1…

A: To solve this problem we have to write the electronic configuration of each elements or ions given…

Q: 10. Group the following electron configurations in pairs that would represent similar chemical…

A: We have different elements in our nature. Scientists now have found 118 elements out of which 98 are…

Q: In a single atom, what is the maximum number of electrons which can have quantum number n = 4?…

A: Principle quantum number, n = 4

Q: The ground state configuration for an element is 1 s 22 s 22 p 63 s 23 p 1. What is the atomic…

A: Answer---> Option d. (Aluminium)

Q: Sulphur presents two lines: Ka₁= 5.37216 Å and Ka₂= 5.37496 Å 1. What is the energy difference…

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Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.