description nent in Period 2 and Group 8A. hetal in Group 6A. Does any element with Z ≤ 92 match the description? O Yes O Yes O No O No

Q: IE₁ = 1012 kJ/mol; IE2 = 1900 kJ/mol; IE3 = 2910 kJ/mol; IE4 = 4960 kJ/mol; IE5 = 6270 kJ/mol; IE6 =…

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Q: How many electrons are in the 4th energy level in selenium?

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Q: Which of the following lists contain an alkali metal, a halogen and a metalloid (semi-metal) in that…

A: In the periodic table, alkali metals are Group-1 elements.  Halogens are Group-17…

Q: Which of the following element will have the greatest difference between IE2 and IE3? He Be Mg Ca

A:

Q: Match the regions of the periodic table with their names. A K N В

A: All the answers have been correctly matched below.

Q: The following information is given for three metallic elements A, B, and C. What elements are A, B,…

A: Given: for FCC Density = 7.6479 g/cm3 Radius = 0.12894 nm = 0.12894 × 10-7 cm For BCC Density =…

Q: Ar> Rb >In>P Ar>P> in ?Rb In 7 P 7 Rb > Ar アフ In 7 Ar> R6 Rb 7 In > P > Ar ト

A: The question is based on periodic properties of the element. we have to arrange the elements in…

Q: Arrange the elements given below in the increasing order of their atomic size. (AKS 3h) Element A :…

A: The size of the atom depends on the electronic configuration of the atom. We know that size of the…

Q: Use the following data and the Born-Haber cycle to calculate the first ionization energy (ΔH IE1) of…

A: given, (i) K(s) → K(g) 89 kJ mol-1 Cl(g) + e– → Cl–(g) -349 kJ mol-1 K(s) + ½ Cl2(g) → KCl (s) -437…

Q: Please step by step answer and don't use ASI Answer please

A: (a) The equation Kobs=K1+K2[Y]represents a rate equation where the observed rate constant Kobs…

Q: Name one metalloid in period 4 and one non-metal in period 5:

A: The metalloid in period 4 is ,        Germanium  (Ge)       Arsenic (As)

Q: Which ions have the same number of electrons as an atom of krypton Se^2- As^3- Ca^2+ K+ Which…

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Q: Determine the identity of each element based upon the following data. Period 3 element with the…

A: The given IE value(s) : IE IE value (kJ/mol) IE1 578 IE2 1817 IE3 2745 IE4 11575 IE5…

Q: Which element has a chemical properties that are most similar to potassium? Cesium Sulfur Nitrogen…

A: The vertical column of the elements which are present in the periodic table is known as groups. Each…

Q: Group the electronic configurations of neutral elements in sets according to those you would expect…

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Q: 2. The elements vary from metals through metalloids to nonmetals. They form halides in oxidation…

A: Given, The elements of the unknown group contains metals, metalloids and non metals. The halides of…

Q: Give the symbol of the element that has the largest atomic size in Group 3A

A: as we move left to right in a period, atomic size decreases due to increase in the effective nuclear…

Q: Write an electron-dot symbol for each element: (a) K; (b) B; (c) F; (d) Ca; (e) Se.

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

Q: How many valence electrons are in an element belonging to period 2, group 16? Paragraph v B I U A Ev…

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Q: Which of the followings is an isoelectronic series?

A: ions or atoms that are having same number of electrons present on it is termed as " isoelectronic…

Q: The first five ionization energies (IE, through IE) of a Period 2 element have the following…

A: Ionization energy is the minimum amount of the energy required to remove an electron from the…

Q: Which of the atoms listed below has the largest radius? Al P Si Ana Mg

A: We have to determine which of the given atoms has the largest radius  The given atoms are  Al P Si…

Q: Identify the sub-shell in which electrons with the following quantum numbers are found: n=2, I=0 3p…

A: n = 2  L = 0  Identify the sub - shell which have above quantum number = ?

Q: Does any element with Z ≤ 92 match the description? An alkaline earth metal with a higher atomic…

A: First, we need to identify the atomic number of indium. The atomic number of an element is the…

Q: Which neutral atom is this ? Which group and period ?

A: The electron configuration  corresponds to the element iron (Fe) with an atomic number of 26. Iron…

Q: Which element would be expected to have chemical and physical properties closets to those nitrogen(N…

A: sulfur, because it's in the same groupGroups are columns of a periodic table. Both oxygen and sulfur…

Q: A new element is discovered. The new element is named Tucsonium and has the chemical symbol Tu. It…

A: Each atom has tendency to acquire noble gas electronic configuration either by losing electrons or…

Q: Which statement is true about an element with the generic valence electron configuration ns²np4?…

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Q: Write the condensed (noble-gas) electron configuration of Si.

A: The complete electron configuration of elements can be written by filling the electrons into…

Q: Arrange the following elements according to the increase in their atomic sizes; (0, S, Se) S> Se >0…

A: Atomic radius: The atomic radius of an element decreases as we move from left to right in a period…

Q: 3) which items listed below have a smaller radius than aluminum? B Cl Ga N S

A: The atomic radius of boron is smaller than aluminium being the first member of group 13 series.

Q: Incorrect. In each chosen pair, is the atomic mass higher for the first element listed on the…

A: Atomic Masses : Atomic mass, also known as atomic weight, is the average mass of atoms of an…

Q: description An element in Period 3 and Group 4A. A semimetal in Group 8A. An element in the nitrogen…

A: The periodic table is divided into groups (vertical columns), periods (horizontal rows), and…

Q: Does any element with Z ≤ 92 match the description? An transition element in period 6.

A: The question is asking if there is any transition element in period 6 of the periodic table with an…

Q: Group A: Na, Mg, Al, Si, and P Group B: He, Ne, Ar, Kr, and Xe Which statement is TRUE? The members…

A:

Q: Give the symbol of the element that has the largest atomic size in Period

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Q: Be sure to answer all parts. Identify the element below and give the symbols of the other elements…

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Q: Which atom has the smallest atomic radius P CI Si S How many protons neutrons and electrons does the…

A: the detailed answer is attached below.

Q: QUESTION 17 An orbital for the hydrogen atom contains an electron with an energy of -4.45 x 10-20 j.…

A: Energy is given as:-  - 4.45 x 10-20J

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.