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Write the grounds state electron configuration of the elements that corresponds to each of the following descriptions : A. The group IIB element in 4th period? B. The noble gas in the 3rd period
A. Electron configuration of Scandium[At]4s23d1B. Electron configuration of Argon[Ne] 3s² 3p⁶
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why d-block elements elements are called as outer transition elements and f-block elements as inner transition elements?
The d-block elements are called transition metals and have valence electrons in d orbitals. The inner transition elements are those who have their last 3 shells incompletely filled. The f...
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Why were the compounds
of noble gases discovered late
? Why do noble gases
form
compounds
only
with oxygen and fluorine
?
1. Noble gases were discovered later than other elements, because they were extremely un-reactive. Being inert, they were difficult to isolate via chemical reactions, thus difficult to distinguish as separate...
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why were the compounds of nobel gasses discovered late. why do nobel gasses form compounds with oxygen and fluorine
Noble gasses have full valence shell – 8 paired electrons (this value correspond to number of element’s Group in Periodical table; 8 Group is the last Group in Periodical table)....
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Why were the compounds of noble gases discovered late? Why do noble gases
form compounds only with oxygen and fluorine?
noble gases (He, Ne, Ar, Kr, Xe, Rn) are the elements with the fully filled outer shell of valence electrons, so that under normal conditions their atoms do not need...
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3. (a) Write a balanced chemical equation for the
incomplete combustion of acetylene gas.
(b) Write a balanced chemical equation for the complete combustion of acetylene gas.
In the incomplete combustion of acetylene with oxygen, water and carbon monoxide are formed, rather than carbon dioxide which is formed in the complete combustion. So the balanced equation for...
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Define the second ionization energy of Fluorine. ii. Write an equation to represent the second ionization energy of Fluorine.
Second ionisation energy is the energy required to remove electron from F- gaseous Ion. F- ( g ) -------- F2- ( g ) + e , H is energy required....
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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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list the noble gas elements and place a box around the radioactive noble gases
The six naturally occurring noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn).
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A chemist measures the amount of fluorine gas produced during an experiment. He finds that 6.2g of fluorine gas is produced. Calculate the number of moles of fluorine gas produced
Number of moles = mass in grams / molar mass Molar mass of fluorine, F2 = 19 g/molSince fluorine is a diatomic element, we multiply its mass by 2Thus, 19...
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