Matter Quiz - Science Concepts

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Questions and Answers

What is the term for the heat required to change a liquid to a gas?

  • Sublimation
  • Fusion
  • Condensation
  • Vaporization (correct)

What does it mean when an atom has 5 free electrons?

  • Trivalent
  • Tetravalent
  • Pentavalent (correct)
  • Divalent

What is the mass number of an element defined as?

  • Total number of neutrons and protons (correct)
  • Total number of protons
  • Total number of electrons
  • Total number of protons and electrons

What is the atomic number of an element?

<p>Number of protons (C)</p> Signup and view all the answers

What do you obtain when you combine 2Hâ‚‚ and Oâ‚‚?

<p>2Hâ‚‚O (C)</p> Signup and view all the answers

What determines an element's identity?

<p>The number of protons (C)</p> Signup and view all the answers

What does an isotope of an element have more of?

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

Which component of an atom is found in the nucleus?

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

What happens to the volume of a liquid if pressure increases while temperature remains constant?

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

What is atomic mass defined as?

<p>Number of protons plus the number of neutrons (B)</p> Signup and view all the answers

Flashcards

Heat of Vaporization

The amount of heat energy required to change 1 gram of a liquid into a gas at its boiling point.

What is the atomic number of an element?

The number of protons found in the nucleus of an atom.

Trivalent atom

An atom with three free electrons available for bonding.

What is the mass number of an element?

The total number of protons and neutrons found in the nucleus of an atom.

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What is analysis in chemistry?

The breakdown of a chemical compound into simpler components.

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What defines an element's identity?

The number of protons in an atom's nucleus defines the element.

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What is an isotope?

An isotope has the same number of protons but a different number of neutrons.

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What is atomic mass?

The total number of protons and neutrons in an atom's nucleus.

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What is a compound?

A substance composed of two or more different elements chemically combined in a fixed ratio.

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What is a molecule composed of like atoms called?

A molecule formed from two or more atoms of the same element.

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Study Notes

2.1 Matter Quiz

  • The heat required to change a liquid to a gas is called the heat of vaporisation
  • An atom with 3 free electrons is said to be trivalent
  • The mass number of an element is the number of neutrons and protons
  • When 2Hâ‚‚ and Oâ‚‚ are combined, the product is 2Hâ‚‚O
  • The splitting of a chemical compound is called synthesis
  • The atomic number of an element is the number of protons in the atom
  • An atom with 5 free electrons is said to be pentavalent
  • An atom consists of protons, neutrons, and electrons
  • The maximum number of electrons in the inner shell of an atom is 2
  • The mass of a proton equals the mass of a beta particle

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