The alkaline earth metal with the least density value is
- $Mg$
- $Be$
- $Sr$
- $Ca$
The Correct Option is D
Solution and Explanation
Top Questions on GROUP 1 ELEMENTS
- Thermal stability order of Group 1 hydroxides is:
- MHT CET - 2025
- Chemistry
- GROUP 1 ELEMENTS
- Alkali metal with highest first ionization enthalpy is:
- KEAM - 2025
- Chemistry
- GROUP 1 ELEMENTS
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Metallic sodium dissolved in liquid ammonia giving a deep blue solution which is paramagnetic.
Reasons R: The deep blue solution to the formation of amide.
In the light of the above statements, the correct answer from the options below:- NEET (UG) - 2023
- Chemistry
- GROUP 1 ELEMENTS
- The compound which does not exist.
- JEE Main - 2023
- Chemistry
- GROUP 1 ELEMENTS
Ion having highest hydration enthalpy among the given alkaline earth metal ions is:
- JEE Main - 2023
- Chemistry
- GROUP 1 ELEMENTS
Questions Asked in KEAM exam
If $ X = A \times B $, $ A = \begin{bmatrix} 1 & 2 \\-1 & 1 \end{bmatrix} $, $ B = \begin{bmatrix} 3 & 6 \\5 & 7 \end{bmatrix} $, find $ x_1 + x_2 $.
- KEAM - 2025
- Matrix Operations
- If the kinetic energy decreases by 49%, what is the percentage change in speed?
- KEAM - 2025
- Kinetic Energy
- Evaluate the integral: \[ \int \frac{2x^2 + 4x + 3}{x^2 + x + 1} \, dx \]
- KEAM - 2025
- Integration
- Evaluate the following statement: \[ f(x) = \sin(|x|) - |x| \text{ is not differentiable at } x = \underline{\hspace{2cm}} \]
- KEAM - 2025
- Continuity and differentiability
- Methyl fluoride is prepared by heating methyl bromide in the presence of AgF. This reaction is known as
- KEAM - 2025
- Haloalkanes and Haloarenes
Concepts Used:
Group 1 Elements
Group one of alkali metals is s-block elements with just one electron in their s-orbital. They are are alkali metals. They are named so because of the alkaline nature of the hydroxides and oxides.
Alkali metals are characterized by one s-electron in the valence shell of their atoms.
Alkali metals have a corresponding [Noble gas] ns1 electronic configuration. They occupy the first column of the periodic table. Alkali elements are:
- Lithium(Li)
- Sodium(Na)
- Potassium (K)
- Rubidium (Ru)
- Cesium (Cs)
- Francium (Fr)
They have occupied successive periods from first to seven. Francium is a radioactive element with very low half-life.
Electronic Configuration:
- Alkali metals have one electron in their valence shell.
- The electronic configuration is given by ns1. For example, the electronic configuration of lithium is given by 1ns1 2ns1.
- They tend to lose the outer shell electron to form cations with charge +1 (monovalent ions).
This makes them the most electropositive elements and due to the same reason, they are not found in the pure state.