Elements and Atomic Structure
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Questions and Answers

What is the fundamental composition of life?

  • Matter (correct)
  • Matter and energy
  • Space and mass
  • Energy and space

What is the total number of elements that have been defined?

  • 120
  • 100
  • 118 (correct)
  • 92

What is the smallest component of an element that retains its chemical properties?

  • Proton
  • Molecule
  • Element
  • Atom (correct)

What is the purpose of an element's chemical symbol?

<p>To designate the element (B)</p> Signup and view all the answers

Why do atoms combine and bond with each other in specific ways?

<p>Because of their unique properties (B)</p> Signup and view all the answers

What is the minimum number of elements found in living cells?

<p>30 (A)</p> Signup and view all the answers

What is the charge of a proton?

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

What is the mass of an electron?

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

What determines the atomic number of an element?

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

What is the purpose of the periodic table of elements?

<p>To show the atomic number and relative atomic mass of each element (B)</p> Signup and view all the answers

What is the relationship between the atomic number and mass number of an element?

<p>Atomic number is equal to the number of protons, and mass number is the sum of protons and neutrons (A)</p> Signup and view all the answers

What determines the physical properties of an element, such as melting and boiling points?

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

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