Periodic Table Elements Classification
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Questions and Answers

What is the main purpose of the Periodic Table?

  • To categorize elements based on their physical properties
  • To group elements with similar chemical properties together (correct)
  • To list elements in alphabetical order
  • To identify the atomic number of elements

What type of elements are characterized as being shiny, malleable, and good conductors of heat and electricity?

  • Molecular compounds
  • Non-metals
  • Metals (correct)
  • Metalloids

What is the defining characteristic of a cation?

  • Loses an electron (correct)
  • Gains an electron
  • Has a magnetic property
  • Has a neutral charge

What is the general trend for elements in groups 1-3 when forming ions?

<p>They lose electrons to form cations (D)</p> Signup and view all the answers

What is the name of the ion formed when a chlorine atom gains an electron?

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

What is the purpose of the periodic law?

<p>To predict the chemical properties of elements based on their atomic number (D)</p> Signup and view all the answers

What is the charge of an electron?

<p>$-1.602 imes 10^{-19}$ (A)</p> Signup and view all the answers

What is the atomic number of a Fluorine atom?

<p>9 (D)</p> Signup and view all the answers

What is the atomic mass of a Beryllium atom?

<p>9.012 amu (B)</p> Signup and view all the answers

What is the number of neutrons in a Nitride ion?

<p>7 (C)</p> Signup and view all the answers

What is the symbol for a Chloride ion?

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

What are atoms of the same element but differ in mass called?

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

What do the different isotopes of magnesium have in common?

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

What is the atomic number of deuterium?

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

What is the formula to calculate the average mass of an element?

<p>Σ(fractional abundance x isotopic mass) (A)</p> Signup and view all the answers

What is the natural abundance of helium-3?

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

What is the symbol of the element with atomic number 2?

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

What is the atomic mass of boron-11?

<p>11.0093 amu (B)</p> Signup and view all the answers

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