Sign Up

Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.

Have an account?

Sign In

Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.

Don't have account,

Forgot Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Have an account?

You must login to ask a question.

Need An Account,

You must login to add post.

Need An Account,

Please briefly explain why you feel this question should be reported.

Please briefly explain why you feel this answer should be reported.

Please briefly explain why you feel this user should be reported.

Search
Ask A Question
Home/ Chemistry/“Periodic Table” MCQ with Answer Explanation.

love-insta : Question and Answer Sharing Platform. Latest Articles

On: October 3, 2024 Posted in Chemistry, Education, Exam, NEET Comments: 0 Views: 112

“Periodic Table” MCQ with Answer Explanation.

  1. Which of the following elements has the highest electron density?
    A) Lithium
    B) Beryllium
    C) Boron
    D) Carbon
    Answer: D) Carbon

Explanation: Electron density generally increases across a period. Carbon (C) has a higher electron density compared to lithium, beryllium, and boron.

  1. Which of the following elements has the largest atomic size?
    A) Nitrogen
    B) Oxygen
    C) Fluorine
    D) Neon
    Answer: A) Nitrogen

Explanation: Atomic size decreases across a period from left to right. Nitrogen (N) has the largest atomic radius among the given elements.

  1. Which of the following elements does not belong to the carbon group (Group 14)?
    A) Carbon
    B) Silicon
    C) Germanium
    D) Nitrogen
    Answer: D) Nitrogen

Explanation: Nitrogen (N) is in Group 15, not Group 14, which includes Carbon (C), Silicon (Si), Germanium (Ge), Tin (Sn), and Lead (Pb).

  1. Which of the following elements is a noble gas?
    A) Nitrogen
    B) Argon
    C) Chlorine
    D) Bromine
    Answer: B) Argon

Explanation: Argon (Ar) is a noble gas located in Group 18, known for its inertness and full valence electron shell.

  1. Which of the following elements has the smallest atomic radius?
    A) Lithium
    B) Beryllium
    C) Boron
    D) Carbon
    Answer: D) Carbon

Explanation: Atomic radius decreases across a period from left to right. Carbon (C) has the smallest atomic radius among the listed elements.

  1. Which of the following elements is an example of a metalloid?
    A) Sulfur
    B) Phosphorus
    C) Boron
    D) Sodium
    Answer: C) Boron

Explanation: Boron (B) is a metalloid, exhibiting properties intermediate between metals and nonmetals.

  1. Which of the following elements has the electron configuration [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³?
    A) Bismuth
    B) Thallium
    C) Polonium
    D) Antimony
    Answer: D) Antimony

Explanation: The given electron configuration corresponds to Antimony (Sb), which is in Group 15 and Period 6.

  1. Which of the following elements is a poor reducing agent?
    A) Lithium
    B) Sodium
    C) Potassium
    D) Fluorine
    Answer: D) Fluorine

Explanation: Fluorine (F) is a strong oxidizing agent, not a reducing agent. The other elements listed are good reducing agents due to their tendency to lose electrons.

  1. Which of the following elements has a filled p-subshell in its ground state?
    A) Nitrogen
    B) Oxygen
    C) Neon
    D) Fluorine
    Answer: C) Neon

Explanation: Neon (Ne) has a filled p-subshell with the electron configuration 1s² 2s² 2p⁶.

  1. Which element has the highest electronegativity in the third period?
    A) Sodium
    B) Magnesium
    C) Aluminum
    D) Chlorine
    Answer: D) Chlorine

Explanation: Among the third-period elements, Chlorine (Cl) has the highest electronegativity.

Previous article
Next article

Leave a comment