![]() ![]() Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl.Give reasons for your answer.(a) X has 12 protons and 12 electrons(b) Y has 12 protons and 10 electrons Compare the radii of two species X and Y.What is the number of electrons in Na+?(b) The atomic number of chlorine is 17. The atomic radius of a chemical element is a measure of the size of its atom, usually, the distance from the center of the nucleus to the outermost isolated electron. (a) The atomic number of sodium is 11.What kind of motion does the hand of the clock perform? Justify your answer with reason.When a neutral atom gains electrons to form a negatively. properties:(a) Atomic radius, (b) Ionic radius (c) Variation of size in. Therefore, the three elements ranked from smallest to largest atomic radius would be F < Br < Ca. If a number is divisible by 3 need it to be tested for 9? Justify your answer by stating any 2 numbers which are divisible by 3 but not by 9. f) Theory of Equations: The relation between the roots and coefficients in an.Solution 83PThe atomic radius is one-half the distance between the nuclei. Which one of the following elements exhibit a maximum number of valence electrons?NaAlSiP Arrange these elements in order of increasing atomic size: Ca, Rb, S, Si, Ge, F.(Atomic masses : Be 9 Na 23 Mg 24 Si 28 Cl 35.5 Ca 40) Can the following groups of elements be classified as Dobereiner's triads?(a) Na, Si, Cl (b) Be, Mg, Ca Give reason for your answer. ![]() Number of valence electrons in Cl- ion are:(a) 16(b) 8(c)17(d) 18.Li, Na, KF, CI, BrLi and FLi and Br K and FK and Br Pick out the chemically most reactive elements from the given triads.An element has atomic number 13 and an atomic mass of 27.(a) How many electrons are there in each atom of the element?(b) How are these electrons distributed in the various energy levels?.What is the general name of the elements having 8 electrons in the valence shell of their atoms?.following atoms and ions in order of increasing ionic radius: F, S2, Cl, and Se2. Arrange the following elements in increasing order of their atomic radii.(a) Li, Be, F, N(b) Cl, At, Br I periodic table to predict the relative size of their atomic radii.Which among the following elements has the largest atomic radii?NaMgKCa The lanthanide contraction is the greater-than-expected decrease in atomic radii / ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, which results in smaller than otherwise expected atomic radii /ionic radii for the subsequent elements starting with 72, hafnium.(a) What are valence electrons? Where are valence electrons situated in an atom?(b) What is the number of valence electrons in the atoms of an element having atomic number 13? Name the valence shell of this atom. ![]()
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