21. The chart below shows the relationship between ionization energy and the increase in atomic number. The letter on the chart for the noble gases (Group 18) is most likely: W Atomic number increases (A) W (B) X (C) Y (D) Z increases-

Q: 6. What is the name of the element X with the shorthand electron configuration of [Ne]3s 3p' in the…

A:

Q: Can you determine which of two unknown elements has the larger radius ifthe only known information…

A: From left to right across a period in the periodic table, the atomic radius generally decreases.…

Q: The chart below shows the relationship between ionization energy and the increase in atomic number.…

A: Ionization energy:-Energy required to remove an electron from outermost shell of an element is…

Q: 6 The elements of the Periodic Table are created by a variety of processes discussed in the…

A: New atomic nuclei create from pre existing nucleons.The first nuclei form after bing bang through…

Q: The electron configuration of an element is shown below. 1s22s22p63s1 Name the group this element…

A: There are 18 groups and 7 periods in the periodic table. Modern periodic table based on the atomic…

Q: Characteristic Comet Asterold 1.) Origin Main Asteroid Belt 2.) Irregular/varried eeShape 3.) More…

A: 1) Origin of comet - Centaurs and Kuiper belt2) Shape of asteroid - Irregularly shaped3) Comet's…

Q: Why the elements of group 13 are called p-block elements?

A: P-block elements are those which which last electron enters in any of three p-orbital subshells.

Q: Identify the correct ranking of effective nuclear charge between N,O, and C? Why is that?

A: The effective nuclear charge is the net positive charge experienced by an electron in a…

Q: 11. The number of electrons in the highest energy level of 20Ca is ?

A: Given  Element  = Ca ( Calcium )  Number of electron in Highest Energy level = ?

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: 69 19. What is the electron configuration of the aluminum cation? a. Is 2s22p% c. Is'2s?2p°3s²3p! b.…

A:

Q: The ionization energy for a H atom 1s electron is 2.18x10-18 J and that for a 2p electron is…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: If rubidium has an emission line at 1.28 X 106 m and ng is 3, what is the initial energy level? 6.…

A:

Q: Which one of the following atoms has the largest effective nuclear charge, Zeff? A. C B. N C. O…

A: Given that

Q: where does the reactivity of an atom primarily arise from

A: Atoms are made up of neutrons, protons, and electrons. Neutrons are the non charged particles while…

Q: 21. The chart below shows the relationship between ionization energy and the increase in atomic…

A: 21. Given chart,

Q: Question attached

A: The first ionization energy of an atom is the energy required by the atom to remove one of its…

Q: If the experimentally determined Bi-I distance in bismuth triiodide is 2.81Å , predict the atomic…

A: In the given question we have to predict the atomic radius of I from the given compound bismuth…

Q: List the the main-group elements?

A: The periodic table is defined as the representation of the elements classified into 18 groups and 7…

Q: The first ionization enthalpy for Li is 520 kJ mol^-1. This value corresponds to complete removal of…

A: Given - first Ionization energy of Li = 520 KJ/ mol To find - effective nuclear charge felt by 2s…

Q: A. A main group element with the valence electron configuration 4s' is in periodic group It forms a…

A:

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: 8.48 (a) Why do successive IEs of a given element always in- crease? (b) When the difference between…

A: Ionisation energy is the amount of energy required to remove electron from an isolated gaseous atom.…

Q: Answer the following: 1. Given: Atomic no. 51, mass no. 122 Predict the following a. Electron…

A: ZXA   Where X = element              Z = atomic number              A = mass number  Atomic number…

Q: Antimony belongs to Group SA. What is its correct a. b. Sb-

A: Antimony belongs to Group 5A. The correct electron-dot structure is                       Option d.…

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Q: In the hydrogen atom, the electron is in its lowest energy state, n=1. The maximum electron energy…

A: Introduction Avogadro’s number: It is also known as Avogadro’s constant One mole of substance is…

Q: What causes the shielding effect to remain constant across a period? B I

A: Shielding effect across a period:

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: With specific reference to the Calcium atom, describe what is meant by the term 'shielding effect'.

A: Shielding effect: Shielding effect is defined as the decrease in attraction between an electron and…

Q: Name the anomalous properties of lithium.

A: Anomalous properties of lithium are : Lithium is least reactive but strongest reducing agent among…

Q: 12. How many energy levels, in the electron cloud, would there be in an atom of Sulfur; Element 16…

A: With the help of electronic configuration.

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: xplain the characteristics of Group X elements

A: This question is related to alkali metals.

Q: An atom of which of the following elements has the largest atomic radius? Ca or Sr or Mg or Ba or…

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Q: Which of the following is correctly following the Pauli Exclusion Principle , explain why. Is as ap…

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Q: 15. The gas clou mostly hydroge cloud is irradiat produces a red causes the redo A. Nuclei of…

A: The gas clouds in space are mostly hydrogen gas wherever a gas cloud is irradiated by nearby stars,…

Q: As the attractive force of a nucleus on electrons increases, the size of an atom... O Increases O…

A: Solution The atomic radius of atoms typically decreases from left to right across a amount. There ar…

Q: Which of the following equations represents the 1st lonization Energy of sodium. Select one: O a.…

A: We know that  The ionization energy of a chemical species is the energy required to remove electrons…

Q: The ionization energies for removing successive electrons from sodium are 496 kJ/mol,

A:

Q: Of the following, which has the greatest size? Why? a) F b) S c) Cl d) N^-3 e)P^-3

A: In periodic table, in a period , from left to right size of the atom decreases and in a group, from…

Q: Strontium has a visible line in its spectrum at 539.8 nm. What is its energy in kJ/mol?

A: λ= 539.8 nm = 5.398x10-7 m1 nm = 1x10-9 mThen use the equationE = hν = hc/λwhere h = Planck's…

Q: 7. Which of the following sets of numbers could be used to designate the principal energy levels…

A: The set of numbers which is used to designate the principal energy levels (shells) in an atom are…

Q: 4. The diagram shows the lowest two energy levels of an atom. B 2.4 x 10-19 J A - Use the constants…

A: Energy is inversely proportional to wavelength.

Q: The first ionization energy, E, of a boron atom is 1.33 aJ. What is the wavelength of light, in…

A:

Q: )draw the energy level diagram for the following element. Phosphorus with atomic mass 31 and atomic…

A: Every element has an atomic number and mass number. The number of electrons is equal to the number…