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Mariama Kalokoh
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∙ 8y agoCa
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What number on the periodic table indicates the energy level of an atoms valence electrons?
The number beside the letter represents the energy level. The letter represents the sub level. The exponent represents the number of electrons in the sub level. So in the case of: 1s^2 1 is the energy level; S is the sub level; ^2 is the number of electrons in the sub level.
Which elements have 2 electrons in the 4s sublevel?
Ca
What are the first electrons to be removed when d-block elements form ions?
the 4s electrons are removed first.
How many unpaired electrons in As?
Like all the elements in the nitrogen family, Arsenic has 5 valence electrons. The five electrons inhabit the 4s and 4p orbitals: As: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3
What is similar about 3s and 4s sublevels?
They are both s level orbitals; they can carry two electrons and are spherical in shape. The only difference is that the 4s level is larger than the 3s, and the 3s level will fill first.
What number on the periodic table indicates the energy level of an atoms valence electrons?
The number beside the letter represents the energy level. The letter represents the sub level. The exponent represents the number of electrons in the sub level. So in the case of: 1s^2 1 is the energy level; S is the sub level; ^2 is the number of electrons in the sub level.
Which elements have 2 electrons in the 4s sublevel?
Ca
When comparing the energy of an electron in the 3d sub-level to that of an electron in the 4s sublevel of the same atom?
They are both capable of holding a maximum of 10
Why in periodic table 3 period has 8 elements rather than 18?
That is because the 4s level (which places those elements in period 4) is fist filled with 2 electrons before the 3d level is on terms to be filled with 10 electrons (with a higher energy level than the ground level of both 4s orbits of K and Ca). This 3d-block is called the transition metals (nr.21-30, Sc to Zn)
What are the first electrons to be removed when d-block elements form ions?
the 4s electrons are removed first.
Why does 4s orbital start filling while 3p orbital is empty?
The electrons fill in the lowest energy orbital that is available. Electrons in the 4s orbital have a lower energy level than electrons in the 3p orbital, so the 4s orbitals are filled with electrons first.
How many unpaired electrons in As?
Like all the elements in the nitrogen family, Arsenic has 5 valence electrons. The five electrons inhabit the 4s and 4p orbitals: As: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3
What is the 4S orbital?
The lowest energy level of 4th electronic shell of an atom is '4s' it contains 2 electrons in maximum.
What is similar about 3s and 4s sublevels?
They are both s level orbitals; they can carry two electrons and are spherical in shape. The only difference is that the 4s level is larger than the 3s, and the 3s level will fill first.
How many electrons completely fill the fourth energy level?
1s = 2 + 2s & p = 8 + 3s & p & d = 18 + 4s & p & d & f = 32 { close to binary } + = Total is 60 electrons.
How are the orbitals different in sublevels of the same principal energy level?
In every atom there are principle energy levels, sub-levels and atomic orbitals. The principle energy levels are often those first taught when studying chemistry. They correspond to how close the electrons are to the nucleus. The first principle energy level is closest to the nucleus and can hold a maximum of two electrons. The second principle energy level is slightly further away from the nucleus and can hold a maximum of eight electrons. The third energy level is even further away and can hold a maximum of ten electrons. Each principle energy level is comprised of different sub-levels: s, p, d and f. The s sub-level can hold a maximum of two electrons; , p a maximum of 6; d, a maximum of 10 and f, a maximum of 14 (although the f sub-level is only present in the lanthanide and actanide series). Sub-levels all have different energies and electrons fill sub-levels in order of lowest energy to highest. The first principle energy level has one sub-level, the 1s sub-level. The second principle energy level has two sub-levels, 2s and 2p. The third principle energy level has three sub-levels, 3s 3p and 3d. (However, the 4s sub-level is filled before the 3d sub-level, which is a different matter which cannot be explained quite so simply.) Now, each sub-level is comprised of atomic orbitals which define the approximate boundaries of the electron orbit. Each orbital can hold up to two electrons, so a s sub-level has one orbital; a p sub-level has three orbitals; a d sub-level has five orbitals and a f sub-level has seven. This explanation is really quite brief as there is so much more information concerned with principle energy levels, sub-levels and atomic orbitals.
What is the electron configuration of ferrous?
Fe3+=1s2 2s2 2p6 3s2 3p6 3d5You might think that it should me ...... 4s2 3d3...this is incorrect..your argument may be that....3d sub shell has more energy than 4s sub shell...& therefore,electrons from 3d,should be removed 1st.This happens when there are no electrons in shells.....when the sub shells are filled with electrons,it change.Hence,after electrons are filled in orbitals,4s electrons have more energy than 3d electrons...so, the electron config. of Fe3+=...3p6 3d5........not 4s2 3d3Here...2 electrons are removed from 4s and 1 electron is removed from 3d....therefore,it makes Fe3+ ion..
