Atom and Chemical Elements Quiz
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Questions and Answers

What is the main distinguishing factor between different chemical elements?

  • The number of electrons in their atoms
  • The size of their atoms
  • The number of protons in their atoms (correct)
  • The number of neutrons in their atoms

    • What is the consequence of an atom having more electrons than protons?

  • It becomes electrically neutral
  • It becomes negatively charged (correct)
  • It becomes a different chemical element
  • It becomes positively charged

    • What makes it impossible to see atoms with conventional microscopes?

  • Their small size (correct)
  • Their complex structure
  • Their electromagnetic nature
  • Their rapid movement

    • What is the main reason for the nucleus of an atom being positively charged?

    <p>The presence of protons</p> Signup and view all the answers

    What are atoms with the same number of protons but different number of neutrons called?

    <p>Isotopes</p> Signup and view all the answers

    Where is more than 99.94% of an atom's mass located?

    <p>In the nucleus</p> Signup and view all the answers

    What is an atom called when it has more protons than electrons?

    <p>Positive ion</p> Signup and view all the answers

    What force attracts the electrons of an atom to the protons in the atomic nucleus?

    <p>Electromagnetic force</p> Signup and view all the answers

    What force is usually stronger than the electromagnetic force that repels the positively charged protons from one another?

    <p>Nuclear force</p> Signup and view all the answers

    Under certain circumstances, what force becomes stronger than the nuclear force, leading to nuclear decay?

    <p>Electromagnetic force</p> Signup and view all the answers

    What kind of compounds can atoms form by attaching to one or more other atoms?

    <p>Molecules or crystals</p> Signup and view all the answers

    What science studies the ability of atoms to attach and detach from each other, responsible for most physical changes observed in nature?

    <p>Chemistry</p> Signup and view all the answers

    Where does the word 'atom' originate from?

    <p>Greek word atoma</p> Signup and view all the answers

    What did John Dalton use to refer to the discrete units of weight with which chemical elements combine?

    <p>Atoms</p> Signup and view all the answers

    What is the primary purpose of JEE Main?

    <p>To get admission to government-sponsored technical colleges like NITs and IIITs</p> Signup and view all the answers

    What is the main purpose of JEE Advanced?

    <p>To get admission to the IITs</p> Signup and view all the answers

    What is the relationship between JEE Main and JEE Advanced?

    <p>A candidate must pass JEE Main to appear for JEE Advanced</p> Signup and view all the answers

    What do JEE Main and JEE Advanced open the gates to?

    <p>Top engineering institutions in India</p> Signup and view all the answers

    How many total attempts are allowed for JEE Main?

    <p>3</p> Signup and view all the answers

    What is the eligibility criteria for JEE Advanced?

    <p>Ranked among the top 2,00,000 JEE Main rank holders</p> Signup and view all the answers

    What is the language of the JEE Advanced exam?

    <p>English and Hindi</p> Signup and view all the answers

    How many papers are there in the JEE Main exam?

    <p>3</p> Signup and view all the answers

    What types of questions are included in JEE Advanced?

    <p>MCQs and Numerical Type Questions</p> Signup and view all the answers

    What is the duration of the JEE Main exam?

    <p>3 Hours</p> Signup and view all the answers

    How many total attempts are allowed for JEE Advanced?

    <p>2</p> Signup and view all the answers

    What subjects are covered in Paper 1 of JEE Main?

    <p>Physics, Chemistry, and Mathematics</p> Signup and view all the answers

    What is the main difference between the eligibility criteria of JEE Main and JEE Advanced?

    <p>Passing JEE Main</p> Signup and view all the answers

    What makes it impossible to see atoms with conventional microscopes?

    <p>Their small size</p> Signup and view all the answers

    What force attracts the electrons of an atom to the protons in the atomic nucleus?

    <p>Electromagnetic force</p> Signup and view all the answers

    Where is more than 99.94% of an atom's mass located?

    <p>Nucleus</p> Signup and view all the answers

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