First 12 Elements of the Periodic Table
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Questions and Answers

Which of these elements is NOT an alkali metal?

  • Boron (correct)
  • Sodium
  • Lithium
  • Magnesium (correct)

What is the atomic number of the second lightest element?

  • 1
  • 3
  • 2 (correct)
  • 4

Which element is a key component of chlorophyll?

  • Fluorine
  • Magnesium (correct)
  • Boron
  • Sodium

What is the atomic number of the element commonly found in diamond and graphite forms?

<p>6 (A)</p> Signup and view all the answers

Which of these elements is a noble gas?

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

Flashcards

Hydrogen (H)

Atomic number 1, a nonmetal, and the most abundant element in the universe.

Helium (He)

Atomic number 2, a noble gas used in balloons and coolants.

Carbon (C)

Atomic number 6, essential for life and found in diamonds and graphite.

Oxygen (O)

Atomic number 8, crucial for respiration and combustion, colorless gas.

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Magnesium (Mg)

Atomic number 12, important for photosynthesis and found in lightweight alloys.

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Study Notes

First 12 Elements of the Periodic Table

  • Hydrogen (H): Atomic number 1, the simplest element, a nonmetal, and the most abundant element in the universe. A colorless, odorless, and highly flammable gas at standard temperature and pressure. Found commonly in compounds such as water.

  • Helium (He): Atomic number 2, a noble gas, colorless, odorless, and monatomic. Used in balloons and as a coolant in cryogenic applications. The second lightest element.

  • Lithium (Li): Atomic number 3, an alkali metal, soft, silvery-white, and highly reactive. Used in batteries and in some lubricating greases.

  • Beryllium (Be): Atomic number 4, a reactive metalloid, hard, and relatively brittle. Used in alloys for high-strength applications such as aircraft components and springs.

  • Boron (B): Atomic number 5, a metalloid, hard, and dark-gray. Used in heat-resistant glass and in some specialized alloys.

  • Carbon (C): Atomic number 6, a nonmetal, commonly found in diamond and graphite forms. A fundamental component of organic molecules and is essential for life.

  • Nitrogen (N): Atomic number 7, a nonmetal, colorless, odorless, and diatomic gas. A major component of Earth's atmosphere and used in fertilizers and explosives.

  • Oxygen (O): Atomic number 8, a nonmetal, colorless, odorless, and diatomic gas. Crucial for respiration in most living organisms and combustion.

  • Fluorine (F): Atomic number 9, a highly reactive halogen, a pale-yellow gas. Used in fluoridation of water, and in some refrigerants, but highly toxic.

  • Neon (Ne): Atomic number 10, a noble gas, colorless, odorless, and monatomic. Used in bright light displays (neon signs).

  • Sodium (Na): Atomic number 11, a highly reactive alkali metal, soft, silvery-white, and important component in many biological processes.

  • Magnesium (Mg): Atomic number 12, a reactive alkaline earth metal, silvery-white, and crucial in chlorophyll (a key component of photosynthesis). Used in lightweight alloys.

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Description

Test your knowledge of the first 12 elements in the periodic table. This quiz covers fundamental properties, classifications, and common uses of each element. Perfect for chemistry students and enthusiasts alike!

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