Those elements, with an electronic configuration of valence shell ns2 np6 show little tendency to react chemically, are called?
Correct answer: D. Noble gases
- A. Lanthanides
- B. Actinides
- C. Alkali metals
- D. Noble gases
Explanation
The reactivity of lanthanides is generally lower than that of the corresponding alkali and alkaline earth metals. Lanthanides are relatively unreactive with water and oxygen, and they do not readily dissolve in most acids. However, they can react with strong oxidizing agents, such as chlorine or fluorine, to form a variety of compounds. Actinides are highly reactive elements due to their large atomic and ionic radii, high charge densities, and the presence of f-orbitals, which make them more susceptible to oxidation and reduction reactions. The alkali metals are highly reactive metals, and their reactivity increases from top to bottom of the group. Noble metals include metals such as gold, silver, platinum, and palladium. These metals are characterized by their low chemical reactivity, which is due to the fact that they have a completely filled outermost electron shell.
Last updated
About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2NaOH(aq) + Cl2(g) → NaCl + NaClO + H2O proceed at:
A compound 'X' on heating gives a colourless gas. The residue is dissolved in water to produce 'Y'. When CO₂ is passed through the aqueous solution of 'Y', it produces 'Z', which on gentle heating gives back 'X'. Compound 'X' is:
A elements are named as alkali metals because
A gas which burn with blue flame is:
A gas which burns with a blue flame is