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Answer:1s22s22p63s2- Magnesium
1s22s22p63s23p3- phosphorus
1s22s22p63s23p64s23d104p6- krypton
1s22s2- Beryllium
1s22s22p6- neon
1s22s22p3- nitrogen
Explanation:
The identity of an element is deducible from its electronic configuration by looking out for the outermost shell configuration and counting the total number of electrons present. for example; phosphorus 15 electrons and an outermost shell configuration of ns2 np3. Any electronic configuration written above which reflects these characteristics must belong to phosphorus.
The electronic configuration is the arrangement of the electrons of an atom or a molecule in its molecular or atomic orbitals.
The electronic configuration follows the Aufbau principle, Pauli exclusion rule and Hund's rule.
The correct answers are:
- 1s²2s²- Beryllium
- 1s²2s²2p⁶- neon
- 1s²2s²2p⁶3s²- Magnesium
- 1s²2s²2p⁶3s²3p³- phosphorus
- 1s²2s²2p³- nitrogen
- 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶- krypton
The correct explanation is:
1. The electronic configuration of Beryllium can be written as: [He] 2s².The atomic number present in the element is 4, while a number of neutrons are 5, shell structure for beryllium can be written as [2,2].
2. The electronic configuration of neon is: [He]2s²2p⁶.
The number of electrons present in the shells of neon is 2 and 8. It is a noble gas.
3. The electronic configuration of magnesium will be: [Ne] 3s² the atomic number of magnesium is 12.
It is an alkaline earth metal of Group 2 (IIa). It is the lightest structural metal.
4. Phosphorus has 15 electrons. Phosphorus is a diamagnetic element. The electronic configuration of phosphorus is: [Ne] 3s² 3p³.
5. The atomic number of nitrogen is 7 and has 5 valence electrons.
The configuration of nitrogen is: [He] 2s²2p³
6.Electron configuration of krypton is: [Ar] 3d¹⁰ 4s² 4p⁶.
The atomic number is 36 and the distribution of electrons per shell is 2,8,18,8.
To learn more about electronic configuration follow the given link:
https://brainly.com/question/4949433
