Its electronic configuration is 1s22s22p63s23p6 4s2 instead of 1s22s22p63s23p6 3d14s1.

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This is because of Afbau’s principle which claims that electrons fill orbitals beginning at the lowest available (possible) energy levels before filling higher levels (e.g. 1s before 2s and 4s prior to 3d). As the power of 3d orbital is greater than 4s, the last two electrons in calcium acquire accomadated in 4s energy level rather of 3d.

It is as such order in which the atomic orbitals are filled as proclaimed in Afbau’s principle that the electronic configuration of calcium is 2, 8, 8, 2 and also not 2, 8, 9, 1 or 2, 8, 10.  


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Lithium is a steel whose electronic configuration is 2 and 1 including 3 protons 3 electron  and 3 neutrons. So, if we remove 1 electron from lithium to make it stable. Climate ,why would we call it lithium as it has 3 proton 3 electrons and also 3 neutrons. But , ~ removal of 1 electron only 2 electrons  are left. So, why would we call it lithium then.


An aspect of atomic load 40 has 2,8,8,2 as the electronic configuration. Which among the adhering to statements concerning this facet is not correct
It is possible to compose down the digital configuration of one atom if we understand its atomic numbers. Why this is so?

Lithium is a metal whose digital configuration is 2 and also 1 including 3 protons 3 electrons  and 3 neutrons. So, if us remove 1 electron from lithium to do it stable. Then ,why would we contact it lithium as the has 3 proton 3 electrons and 3 neutrons. But , after ~ removal the 1 electron only 2 electrons  are left. So, why would certainly we contact it lithium then.


An element of atomic weight 40 has 2,8,8,2 together the digital configuration. Which among the adhering to statements regarding this aspect is not correct
It is possible to create down the digital configuration of an atom if we understand its atom numbers. Why this is so?

Lithium is a metal whose electronic configuration is 2 and also 1 including 3 protons 3 electron  and 3 neutrons. So, if we remove 1 electron from lithium to make it stable. Then ,why would certainly we call it lithium as the has 3 proton 3 electrons and also 3 neutrons. But , after ~ removal of 1 electron only 2 electrons  are left. So, why would certainly we call it lithium then.


An aspect of atomic load 40 has actually 2,8,8,2 together the electronic configuration. Which among the following statements regarding this facet is not correct
Write the balanced chemical reaction because that the dehydration of concentrated sulphuric acid with sugar crystals.
Write the balanced chemical reaction because that the dehydration of focused sulphuric acid with sugar crystals.

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Write the well balanced chemical reaction for the dehydration of focused sulphuric acid through sugar crystals.