Class 12 Chemistry Elements and Particles Quiz
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Questions and Answers

What is the chemical symbol for oxygen?

  • N
  • H
  • O (correct)
  • C

What is the atomic number of carbon?

  • 8
  • 6 (correct)
  • 9
  • 7

Which subatomic particle has a negative charge?

  • Neutron
  • Positron
  • Proton
  • Electron (correct)

What is the chemical formula for water?

<p>H2O (A)</p> Signup and view all the answers

What is the valency of carbon?

<p>4 (B)</p> Signup and view all the answers

Which subatomic particle is responsible for the chemical properties of an element?

<p>Electron (A)</p> Signup and view all the answers

What is the pH value of a neutral solution?

<p>7 (A)</p> Signup and view all the answers

What is the molecular formula of methane?

<p>CH4 (D)</p> Signup and view all the answers

Flashcards

Oxygen's Symbol

The symbol used to represent oxygen in chemical formulas.

Atomic Number

The number of protons in an atom's nucleus, unique to each element.

Electron

A subatomic particle with a negative charge, found orbiting the nucleus.

Water's Formula

The chemical formula representing the composition of water, indicating two hydrogen atoms and one oxygen atom.

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Valency

The number of bonds an atom can form, indicating its combining capacity.

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Chemical Properties

Located outside the nucleus, electrons determine how an atom interacts with others, influencing its chemical properties.

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pH of Neutrality

A measure of acidity or alkalinity, where 7 indicates a neutral solution.

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Methane's Formula

The molecular formula for methane, indicating one carbon atom and four hydrogen atoms.

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