The question requires us to determine the order of metallic character among the elements: Boron (B), Aluminum (Al), Magnesium (Mg), and Potassium (K). The metallic character of an element is determined by its ability to lose electrons and form positive ions (cations). It generally increases as you move down a group in the periodic table and decreases as you move across a period from left to right.
Let's analyze each element:
Given these observations, the correct order of metallic character among the elements is:
This corresponds to the correct option:
Hence, the correct answer is K > Mg > Al > B.
Given below are two statements:
Statement (I): According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number.
Statement (II): Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers.
In the light of the above statements, Choose the correct answer from the options given below:
The correct orders among the following are:
[A.] Atomic radius : \(B<Al<Ga<In<Tl\)
[B.] Electronegativity : \(Al<Ga<In<Tl<B\)
[C.] Density : \(Tl<In<Ga<Al<B\)
[D.] 1st Ionisation Energy :
In\(<Al<Ga<Tl<B\)
Choose the correct answer from the options given below :