How many unpaired electrons are present in the ground state of an atom from each of the following groups?(a) 2A(2)(b) 5A(15)(c) 8A(18)(d) 3A(13)

Q: MCQ 13: The region around the nucleus which can be filled with one or two electrons is known as A.…

A: All atoms have the same number of electrons as protons. Negative electrons are attracted to the…

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 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: How many 3d electrons are found in each of the following elements? a. nickel, Z = 28 b. vanadium, Z…

A: a. Nickel ( Ni ) , Z = 28  b. Vanadium ( V ) , Z = 23  c. Manganese ( Mn ) , Z = 25  d. Iron ( Fe )…

Q: 7.37 Which is the smallest atom in Group 7A?

A: Group 7A includes halogen atoms. The elements present in group 7A are: Flourine, FChlorine,…

Q: Which element has 71 neutrons? a) 222Rn b) 146Nd c) 159Sm d) 140Ce e) 121Sn

A: We can find neutrons by subtracting number of protons form mass number.  No.of neutrons=mass…

Q: Identify the element given the set of quantum numbers of the last entering electron. 4, 2, +1,…

A: A question based on quantum numbers, which is to be accomplished.

Q: 8) Barium has 56 protons and about 81 neutrons in its nucleus. The first ionization energy of barium…

A: Number of protons = 56  Number of neutrons = 81 Mass number = Number of protons + Number of…

Q: How much energy is required to remove an electron from the second shell 1 ДЕ -(-2.178 х 1о1 J) 2 n.…

A: Ionization energy: It is the energy required to remove the electron from its outermost shell from…

Q: - Which of the following is not considered as isoelectronic particles? _ (a) ,N3 , 80-2, (b) 80-2 ,…

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Q: Which of the following contain partially filled p orbital? A) 6 X B) 13 X C) 26 X D) 15 X

A: P orbital has 3 sub shell , and in each sub shell it can accommodate 2 electrons with opposite…

Q: 7.125 How do ionization energies change with increasing atomic number (a) down a group of elements…

A: Ionisation energy (IE) : The ionisation energy is defined as the amount of energy to remove the most…

Q: 1. Give the electronic configuration of the following elements.  a. Cation of element A (Z = 38) b.…

A: Cations are positively charged ions. Anions are negatively charged ions. Cations are formed by the…

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: Identify each element below, and give the symbols of the other elements in its group:(a) [He] 2s22p1…

A: For the given electronic configurations , the correct element has to be identified and symbol of the…

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: In the following questions identify the elements of the periodic table by their atomic numbers.…

A: Ans

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: 4. How many electron deficits are there in an object with a charge of 7.5 x10- C? 18

A: Just apply  q= n×e  , where e is electronic charge and n is no. of electrons. And e= 1.6×10-19C  n =…

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

A: Answer

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: Identify each element below, and give the symbols of the other elements in its group:(a) [He]…

A: In the periodic table, every element has the atomic number. The atomic number is defined as the…

Q: Normal Hydrogen atom is to be raised to the fourth level by means of radiation, the wavelength of…

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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: Which of the following statements is correct for an electron that has the quanutm numbers n = 4 and…

A: the electron must have a spin quantum number ms = +1/2 is the correct answer for this particular…

Q: The electron configuration for the strontium atom is: none of these. O 1s2p 1s25-2p 3s-3d-P3p [Kr]…

A: The electronic configuration of an element shows the arrangement of electrons in orbitals of an…

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…

A:

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: Calculate the frequency of the radiation emitted when an electron in a hydrogen atom drops from the…

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Q: 4. Which among the shells given below is closest to the nucleus? a. М с. L b. K d. O 5. The d…

A: Answers of 4,5,6

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: What element is represented by the electron configuration 1s²2s°2p°3s?3p²4s²3d°? _

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: What is the maximum number of electrons that can be found with the main quantum number n = 4 in a…

A: Given -> n = 4

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

A: An Unpaired electron is an electron that is present in the orbital of an atom singly rather than a…

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…

A: