Question

Select the correct electron configurations from the list below. You can refer to the periodic table for atomic numbers. Check all that apply. Check all that apply.
The electron configuration of S2− is [Ne]3s23p6.
The electron configuration of Ag+ is [Kr]5s14d9.
The electron configuration of Ni is [Ar]4s23d8.
The electron configuration of Rb is [Kr]5s04d1.
The electron configuration of Si is [Ne]3s23p2.

Answer 1

The answer is:

Ni = [Ar] 4s² 3d⁸

S²⁻ = [Ne] 3s² 3p⁶  

Si = [Ne] 3s² 3p²  

Further Explanation

An atom is a basic unit of matter, consisting of an atomic nucleus and a cloud of negatively charged electrons that surround it. The nucleus consists of protons with a positive charge, and neutrons with a neutral charge (except for the nucleus of Hydrogen-1, which has no neutrons). The electrons in an atom are sure to the nucleus by the electromagnetic force. A group of atoms can also bind to one another, and form a molecule. Atoms containing the same number of protons and electrons are neutral, whereas those containing different numbers of protons and electrons are positive or negative and are called ions. Atoms are grouped in line with the number of protons and neutrons contained within the nucleus. The number of protons in an atom determines the chemical elements of the atom, and the number of neutrons determines the isotope of that element.

In nuclear physics and quantum chemistry, the electron configuration is that the arrangement of electrons in an atom, molecule, or other natural objects. Like other elementary particles, electrons are obedient to the laws of quantum mechanics and display the properties of particle-like and wave-like. Formally, the quantum state of a particular electron is determined by its wave function, which is a function of space and time of complex value. According to Copenhagen's interpretation of quantum mechanics, the position of an electron cannot be determined except after the measurement action that causes it to be detected. The probability of the measurement action will detect an electron at a certain point in space is proportional to the square of the absolute value of the wave function at that point. Electrons can move from one energy level to another by emission or absorption of quantum energy in the form of photons. Because of Pauli's prohibition principle, no more than two electrons can occupy an atomic orbital, so that the electron will only jump from one orbital to another only if there is a vacancy in it.

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Grade: High School

Subject: Chemistry

keywords: the electron configuration

Answer 2

Answer:

Ni = [Ar] 4s² 3d⁸

S²⁻ = [Ne] 3s² 3p⁶

Si = [Ne] 3s² 3p²

Explanation:

Correct options.

Ni = [Ar] 4s² 3d⁸

The atomic number of nickel is 28. Orbitals are correctly filled with 28 electrons. That's why it is correct electronic configuration.

S²⁻ = [Ne] 3s² 3p⁶

it is correct because atomic number of sulphur is 16 and two electrons are present because of 2- charge so that's why 6 electrons are present in 3p⁶.

Si = [Ne] 3s² 3p²

it is correct electronic configuration.

Other options:

Ag⁺ = [Kr] 5s¹ 4d⁹

It is incorrect electronic configuration because electron cannot remove from the 4d¹⁰ because it is stable. The one electron must be removed from 5s¹.

Rb = [Kr] 5s⁰ 4d¹

The correct electronic configuration is [Kr] 5s¹.