Chemistry, 04.10.2020 14:01 lesliezavalaa16

Write the electron configurations for the first 10 elements on the periodic table

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Answer from: bryanna0105

The electronic configuration of the first ten elements are as follows:

H → 1s¹

He → 1s²

Li → 1s² 2s¹

Be → 1s² 2s²

B → 1s² 2s² 2p¹

C → 1s² 2s² 2p²

N → 1s² 2s² 2p³

O → 1s² 2s² 2p⁴

F → 1s² 2s² 2p⁵

Ne → 1s² 2s² 2p⁶

Elements are named according to there atomic number in the periodic table.

The number of electron in an electronically neutral atom is equals to the number of protons.

The number of protons is also the atomic number of that element.

The first ten elements are Hydrogen, Helium, lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine and Neon.

The electronic configuration of elements is base on the number of electrons.

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Answer from: Broov

Explanation:

H - 1s¹

He - 1s²

Li - 1s² 2s¹

Be - 1s² 2s²

B - 1s² 2s² 2p¹

C - 1s² 2s² 2p²

N - 1s² 2s² 2p³

O - 1s² 2s² 2p⁴

F - 1s² 2s² 2p⁵

Ne - 1s² 2s² 2p⁶

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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.

Answer from: Quest

the answer is c. nacl

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Write the electron configurations for the first 10 elements on the periodic table
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