Physical Properties of Matter
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Questions and Answers

What is the formula to calculate the number of neutrons in an atom?

  • Number of neutrons = Mass number (A) - Atomic number (Z) (correct)
  • Number of neutrons = Atomic number (Z) + Mass number (A)
  • Number of neutrons = Atomic number (Z) × Mass number (A)
  • Number of neutrons = Mass number (A) × Atomic number (Z)

    • What is the definition of isotopes?

  • Atoms that have the same atomic number but different mass numbers (correct)
  • Atoms that have the same number of neutrons and electrons
  • Atoms that have the same number of protons and electrons
  • Atoms that have the same mass number but different atomic numbers

    • What is the charge of an anion?

  • Neutral
  • Positive
  • Negative (correct)
  • It can be either positive or negative

    • What holds ions together in an ionic bond?

    <p>Electrostatic forces</p> Signup and view all the answers

    What is the name of the ion that is a neutral atom that loses electrons and has a positive charge?

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

    What is the main characteristic of a heterogeneous mixture?

    <p>It has visibly distinguishable parts</p> Signup and view all the answers

    What is an example of a physical property of matter?

    <p>Melting point of a substance</p> Signup and view all the answers

    What is the term for a change in which a substance changes its physical appearance but not its composition?

    <p>Physical change</p> Signup and view all the answers

    What is an example of a chemical change?

    <p>Burning of paper</p> Signup and view all the answers

    Which of the following properties of matter depends on the size or amount of the sample?

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

    What is the term for a mixture that is uniform throughout?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What is the result of a chemical reaction?

    <p>A change in chemical composition</p> Signup and view all the answers

    What is the purpose of the arrow in a chemical equation?

    <p>To indicate the direction of converting reactants to products</p> Signup and view all the answers

    How are the physical states of substances represented in a chemical equation?

    <p>Within subscript parentheses</p> Signup and view all the answers

    What is the correct order of balancing a chemical equation?

    <p>Balance other elements, then H, then O</p> Signup and view all the answers

    What is the characteristic taste of acids?

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

    What is the correct balanced equation for the reaction of hydrogen gas with oxygen gas?

    <p>2H2 (g) + O2 (g) 2H2O (l)</p> Signup and view all the answers

    What is the purpose of applying a solution of FeCl3 to a bleeding wound?

    <p>To stop bleeding and promote clotting</p> Signup and view all the answers

    Why does the sky appear blue?

    <p>Due to the scattering of blue light by colloidal dust particles</p> Signup and view all the answers

    What is a characteristic of gases?

    <p>They are highly compressible and mix completely when confined</p> Signup and view all the answers

    What is the unit of pressure in the SI system?

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

    What is the function of a barometer?

    <p>To measure the pressure of the atmosphere</p> Signup and view all the answers

    What is the result of settling mud particles in a mixture of water and mud?

    <p>The water can be filtered and used</p> Signup and view all the answers

    What is the pressure of a column of mercury exactly 760 mm high at 0°C at sea level?

    <p>101.325 kPa</p> Signup and view all the answers

    What are the four variables that define the physical properties of any gas?

    <p>Pressure, temperature, volume, and number of moles</p> Signup and view all the answers

    What is the relationship between the pressure and volume of a fixed amount of gas at a constant temperature, according to Boyle's Law?

    <p>Pressure is inversely proportional to volume</p> Signup and view all the answers

    What is the relationship between the volume of a fixed amount of gas and its absolute temperature, according to Charles's Law?

    <p>Volume is directly proportional to temperature</p> Signup and view all the answers

    What is the purpose of the equation T(Kelvin) = 273 + T(Celsius)?

    <p>To convert Celsius to Kelvin</p> Signup and view all the answers

    What is the relationship between the volume of a gas and the number of moles of the gas, according to Avogadro's Law?

    <p>Volume is directly proportional to the number of moles</p> Signup and view all the answers

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