Significant Figures in Measurements Quiz
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Questions and Answers

Which unit of measurement is associated with the study of moles in chemistry?

  • Meters
  • Grams
  • Liters
  • Moles (correct)

    • What does the atomic number of an element represent?

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

    • Which family of elements in the periodic table is known for their high reactivity with other elements?

  • Transition metals
  • Noble gases
  • Halogens
  • Alkali metals (correct)

    • What is the unique identifier of an element in the periodic table?

    <p>Atomic number</p> Signup and view all the answers

    Which zone of the periodic table contains elements with properties intermediate between metals and non-metals?

    <p>Metalloid zone</p> Signup and view all the answers

    What type of elements are typically ductile, malleable, and good conductors of heat and electricity?

    <p>Transition metals</p> Signup and view all the answers

    What is the general term for substances that dissociate into ions when dissolved in water?

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

    In the periodic table, which group contains elements that tend to form -1 anions?

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

    What type of elements are typically poor conductors of heat and electricity and tend to gain electrons in chemical reactions?

    <p>Non-metallic elements</p> Signup and view all the answers

    What is the valency of lanthanides?

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

    What is the main characteristic of all actinides?

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

    What happens to the atomic radius as you move from right to left across a period in the periodic table?

    <p>It increases</p> Signup and view all the answers

    Why do atoms on the left of the periodic table have a larger atomic radius compared to those on the right?

    <p>They have fewer protons</p> Signup and view all the answers

    What happens to the metallic character as you move from right to left across a period in the periodic table?

    <p>It increases</p> Signup and view all the answers

    What is the primary reason for the increase in metallic character from right to left across a period?

    <p>Increase in atomic radius</p> Signup and view all the answers

    Which element has the highest melting point?

    <p>$Tm$</p> Signup and view all the answers

    What pattern do elements in the same group or family of the periodic table exhibit?

    <p>They form similar compounds and react similarly</p> Signup and view all the answers

    What is the primary characteristic of lanthanides and actinides?

    <p>They are naturally occurring</p> Signup and view all the answers

    Why do atoms on the right of the periodic table have a smaller atomic radius compared to those on the left?

    <p>Their electrons are attracted more strongly to the nucleus</p> Signup and view all the answers

    Which group exhibits elements with the highest metallic character?

    <p>Group 1 and 2</p> Signup and view all the answers

    What is the unique identifier of an element called?

    <p>Atomic number</p> Signup and view all the answers

    Which family of elements includes lithium and potassium?

    <p>Alkali metals</p> Signup and view all the answers

    What is the primary safety equipment recommended to be worn in a laboratory?

    <p>Safety glasses (goggles)</p> Signup and view all the answers

    Which of the following is a characteristic of metallic elements?

    <p>Good electrical conductivity</p> Signup and view all the answers

    What is the zone on the periodic table that separates metals from nonmetals called?

    <p>Metalloid zone</p> Signup and view all the answers

    Which piece of laboratory equipment is used to measure the volume of a liquid?

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

    What is the term for different forms of the same element in the same physical state but with different structural arrangements?

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

    Which family of elements includes fluorine and iodine?

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

    How many significant figures does the measurement 0.00970 kg have?

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

    Which of the following numbers are NOT significant?

    <p>0.040</p> Signup and view all the answers

    What is the number of significant figures in the measurement 80.00 cm?

    <p>4</p> Signup and view all the answers

    How many significant figures are there in the measurement 9.0007 mm?

    <p>4</p> Signup and view all the answers

    What type of zero is NOT considered a significant figure?

    <p>Spacer zero</p> Signup and view all the answers

    What is the number of significant figures in the measurement 0.00060 kg?

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

    What determines the number of significant figures in a measurement?

    <p>The precision of the measuring instrument</p> Signup and view all the answers

    What type of zeros are considered significant figures?

    <p>$0$ between any two other numbers (1-9)</p> Signup and view all the answers

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