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What is the general trend in the size of atomic radii as the atomic number increases within a group?
Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius. Ionic radius is the distance from the...
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Element A has 17 electrons, element B has 19 electrons. Element C has 35 electrons. Which of these elements have the smallest atomic radius
Element A
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The atomic number of Ann element x is 14 and it's relative atomic mass is 28. How many neutrons does an atom x contains? Hence write it's electronic configuration
14 neutrons - relative atomic mass = number of protons (given by the atomic number) + number of neutrons. So for RAM = 28 = NP + NN = 14...
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The atomic number of an element x is 14 and it's relative atomic mass is 28 how many electrons does an atom of x contains
Silicon is a chemical element with the symbol Si, atomic number 14 and relative atomic mass 28. So, in our case X is the Silicon (Si). Silicon-28 is a stable...
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What happen to the atomic size if an element or atom when atomic number increases from left to right across the period of a periodic table
The atomic radius of atoms generally decreases from left to right across a period
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Atomic and ionic radii of the elements of group 16 are smaller than those of the corresponding elements of group 15 and increases down the group. Why?
The atomic radius of group-16 elements or oxygen family are smaller than that of group-15 elements. This is due to increase in the effective nuclear charge from group-15 elements which...
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An element X reacts with O2 to form a compound X2O5. If 0.35g of the element forms 0.55g of the compound, what is the approximate atomic mass of the element?
Let x be atomic mass of the element X (in grams per mole). Atomic mass of O is known, it is 16. Then molar mass of the compound must be...
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The electron configuration of element X is 1s22s22p63s23p3
i) What is the atomic number of this element?
ii) Identify the element.
The element is P (phosphorus). The atomic number is 15.
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Reacts element A which has 7 electrons on layer 3 with 2 moles of magnesium. Indicate element A, model the magnesium bond and specify the number of protons found in the required amount of element A.
Element A is a Chlorine, he has 7 electrons on 3 layer, and 17 protons. Chlorine is a chemical element with the symbol Cl and atomic number 17. Mg +...
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The atomic number of an element x is 14 and it's relative atomic mass is 2. How many neutron does and atom x contains? Hence write its electronic configuration
Element with atomic number 14 is Si. Atom Si contain 28 - 14 = 14 neutrons. Its electronic configuration is 1s22s22p63s23s2.
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