Chemistry, 15.11.2019 23:31 espiritu7470

According to vsepr theory, a molecule with the general formula ax2e (a is the central atom, x is the bonded atom and e is a lone pair of electrons) has how many regions of electron density around the central atom ? ax2e will have what kind of electronic geometry? ax2e will have what kind of molecular geometry?

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AX2E corresponds to a electronic geometry according to VSEPR theory is trigonal planar and the molecular geometry is bent as you can see in the image attached.

An example of this type of molecule is SO2. Where sulfur is the central atom, oxigen are bonded to sulfur and there is a lonely pair.

There is one region of electron density because the lonely pair. Nevertheless, tak into account the electronegativity of the atoms bonded in a particular case.

The bond angle for this type of molecule is approximately 120.

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

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56 moles of lieter in chemistry

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According to vsepr theory, a molecule with the general formula ax2e (a is the central atom, x is the...

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