The second ionization potential of alkali metals are very high due to:
Correct answer: B. Inert gas configurations
- A. Being s-block elements
- B. Inert gas configurations
- C. Ns1 electronic configuration
- D. Being metals
Explanation
Second ionization energy can be defined as the removal of one mole of electron from the one mole of monovalent gaseous cation of the element as after the first ionization process. Alkali metals contain only one valence electron. On losing this electron, these metals attain noble gas configuration. Therefore, the removal of a second electron requires a huge amount of energy as the electron has to be removed from the shell that is closer to the nucleus.
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