Electron | MCQs

Explanation

 Fe atomic number = 26 → Fe: [Ar] 3d⁶ 4s²  

Fe²⁺ loses 2 electrons → becomes 3d⁶ → 4 unpaired electrons.  

Others have fewer or no unpaired electrons.

Explanation

Electronegativity:- Due to the increase in the number of protons electronegativity increases left to right in a period.

Explanation

The blue color of a Cu²⁺ salt solution is due to the transition of electrons within the d-orbitals (from one d orbital to another, i.e., a d-d transition).

Explanation

Oxygen in water (H₂O) has 2 bonding and 2 lone pairs, totaling 4 electron pairs.

Explanation

The noble-gas notation [Kr] is for krypton, and Zr (Zirconium) follows krypton in the periodic table with the configuration 5s², 4d².

Explanation

The Pauli exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers.

This principle helps to explain the arrangement of electrons in atoms.

Explanation

The fabrication step where proper interconnection of circuit elements is made is called Metallization.

Metallization is often accomplished with a vacuum deposition technique
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Explanation

Some materials hold their electrons very tightly. Electrons do not move through them very well. These things are called Insulators.

In some materials such as glass, rubber, wood and most plastics, the electrons are held quite tightly.

These materials are called insulators.
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Explanation

• High-speed electrons, such as those emitted in beta decay or used in electron microscopy, have wavelengths in the range of 10^-15 meters to 10^-12 meters.
• This is due to their high energy and momentum, which corresponds to a short wavelength according to the de Broglie hypothesis.

Explanation

• The complete transfer of one or more electrons from one atom to another atom forms an ionic bond.
• This type of bond is characterized by the electrostatic attraction between two ions with opposite charges, typically a metal cation and a nonmetal anion.
• The atom that loses an electron becomes a positively charged ion (cation), while the atom that gains an electron becomes a negatively charged ion (anion).