Why does atomic size decrease across a period?

Q: What is the maximum number of electrons that can occupy the "s" sublevel? A 10 B. 2 c. 6 D. 14 2.…

A: (1)  There are different type of orbitals with different shape and different electron occupying…

Q: Order the elements Sr, Ca and Se in order of decreasing atomic size. Explain your answer .

A: Order the elements Sr, Ca and Se in order of decreasing atomic size ?

Q: 7.26 Define atomic radius. Does the size of an atom have aprecise meaning? Explain.

A: To find: Definition of atomic radius.  Does the size of an atom have a precise meaning? Explain

Q: List the atoms in period 1 of the periodic table. List the atoms in period 2.

A: Horizontal rows in the periodic table are called periods. There are 7 periods in the periodic table.…

Q: Which atom has the largest atomic size, P, As, or Se?

A: The periodic variations in atomic size for neutral atoms can always be stated as follows: As moving…

Q: What are the group and period of the element osmium?

A: We need to look at the periodic table in order to figure out the group and period of the element,…

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: 6.92 Write the electron configuration of a xenon core.

A: Electronic configuration: It designate the distribution of electron of molecule or an atom in a…

Q: 6.64 Why is a boundary surface diagram useful inrepresenting an atomic orbital?

A: The reason why boundary surface diagram useful in representing an atomic orbital has to be given,

Q: Quantum numbers

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Q: last electron of nickel quantum numbers?

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Q: What is the unabbreviated electron configuration of calcium and sulfur?

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Q: Explain how irregularities in the periodic trends for electron affinity can be related to electron…

A: Electron affinity is the energy released or gained when an electron is added to the gaseous…

Q: What is the total number of d electrons in a single (ground state) Te atom?

A: Te is the symbol for tellurium which belongs to oxygen family. Its atomic number is 52. The total…

Q: 17. shells and subshells are filled and why. Atomic number of Cr is 24. Write down the electron…

A: Chromium is the transition element. It has the atomic number 24 and it belongs to the d-block…

Q: What do you think is the reason for a decreasing atomic radius within one period

A: Atomic radius :- The distance between the centre of the nucleus and outermost shell in which valance…

Q: Which of the subshell designations are possible and which are impossible?

A: According to quantum mechanics, there are four types of quantum numbers. The electrons are filled in…

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 rules determine the electronic confi guration of an atom?

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Q: An atom's electron configuration ends with 3p4. If another atom has seven more electrons, what would…

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Q: Write the shorthand electron configuration for Cesium

A: Electrons are filled in a different atomic orbital in an atom. According to the Aufbau rule, the…

Q: Describe the relationship between an element’s row number in the periodic table and the highest…

A: Periodic table is the display of chemical elements arranged in a tabular form according to…

Q: what are the quantum numbers that describe the last outermost electron of platinum?

A: The electronic configuration of platinum (Z=78) is [Xe]4f145d96s1 The outermost electron of platinum…

Q: quantum numbers

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Q: Write the electron configuration of a xenon core.

A: The element given is Xenon.

Q: How does the trend in atomic size differ from the trend inionization energy? Explain

A: Atomic size is the distance of the valence shell from the nucleus. Ionization energy is the energy…

Q: Select the correct sequence of the elements Al, K, Mg and N in order of decreasing atomic size.

A: Atomic size increases down the group in periodic table.  Atomic size decreases from left to right in…

Q: 2.12 (a) What electron subshell is being filled for the rare earth series of elements on the peri-…

A: A sub-shell is a collection of orbitals. Sub-shells come in a variety of shapes and sizes, including…

Q: Define and explain the following A. Magnetic Quantum numbers B. Spin quantum numbers

A: A. Magnetic Quantum numbers B. Spin quantum numbers

Q: The outermost five electrons of an atom are in 2p orbitals. what is its atomic number ?

A: Outermost electron are the last set of electrons in an atom. Since we are dealing with neutral atom…

Q: Consider the cross-section diagram of an orbital. Identify the orbital. X 0000 + + +

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Q: Explain, in terms of electrons, why the radius of a potassium atom is larger than the radius of a…

A: A). When a potassium ion is formed an electron is lost from the K atom, this electron is present in…

Q: On a remote island in the Arctic Ocean, a scientist claims to have found a new element (Excitinium)…

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Q: What is meant by saying that the energy of an electron is quantized?

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Q: How electrons are in "s" orbitals in an atom with 28 electrons?

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Q: 6 List all the possible quantum numbers for an electron in the

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Q: Which atom has a larger atomic radius, S or Cl ?Why?

A: Atomic radius may be defined as: -…

Q: What minimum frequency of light is required to ionize lithium?

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Q: Choose the larger atom in pair. P or Pb

A: Atomic radius is defined as the distance of the nucleus to the outermost shell containing electrons.…

Q: What type of sublevels (s,p,d,f) are present in n-2?

A: In atomic structure  sub levels depends on principal quantum number(n) Subleveles types  s p d f

Q: Is ionization energy a periodic property because ground-state electron configuration is a periodic…

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Q: How many core electrons does the element bromine have?

A: Core electrons are those electrons which do not take part in the formation of a chemical bond.…

Q: Why does increasing electrons in a shell level (Period) results in decreasing atomic radius?

A: SOLUTION IS DISCUSSED BELOW :

Q: Which atom should have the larger second ionization energy: sodium or magnesium?  Why?

A: Given  Element = Sodium and Magnesium  Element Containing Highest second Ionization energy = ?