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

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

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

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

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

What is the valency of lanthanides?

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

What is the main characteristic of all actinides?

<p>Radioactive (C)</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 (D)</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 (B)</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 (B)</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 (A)</p> Signup and view all the answers

Which element has the highest melting point?

<p>$Tm$ (A)</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 (B)</p> Signup and view all the answers

What is the primary characteristic of lanthanides and actinides?

<p>They are naturally occurring (C)</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 (B)</p> Signup and view all the answers

Which group exhibits elements with the highest metallic character?

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

What is the unique identifier of an element called?

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

Which family of elements includes lithium and potassium?

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

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

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

Which of the following is a characteristic of metallic elements?

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

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

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

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

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

Which family of elements includes fluorine and iodine?

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

How many significant figures does the measurement 0.00970 kg have?

<p>3 (A)</p> Signup and view all the answers

Which of the following numbers are NOT significant?

<p>0.040 (A)</p> Signup and view all the answers

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

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

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

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

What type of zero is NOT considered a significant figure?

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

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

<p>3 (D)</p> Signup and view all the answers

What determines the number of significant figures in a measurement?

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

What type of zeros are considered significant figures?

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

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