Physical Science – Chapter 6 Worksheet #1 (2)

  1. Which of the following groups contain three elements with stable electron configurations?

a. / lithium, krypton, argon / c. / xenon, neon, boron
b. / argon, neon, barium / d. / helium, xenon, neon
  1. Atoms gain or lose in order to have their outer energy levels ______.

  1. In an electron dot diagram, what does the symbol for an element represent. (e.g. – the F in the diagram to the right.
  1. Which of the elements below is the most stable?
/
  1. In the compound KI, what is the charge on the postassium ion? ______On iodide? ______
  1. When an ionic bond is formed one atom transfers one or more electrons to become a(n) ______, and another atom accepts the electrons to become a(n) ______. When the atoms come together an ______bond is formed.
  1. What is the trend for ionization energy in the periodic table.
  1. Which statement best describes the properties of sodium chloride?

a. / Sodium chloride is a malleable solid. / c. / Sodium chloride has a low melting point.
b. / Solid sodium chloride is a good conductor of electric current. / d. / Liquid sodium chloride is a good conductor of electric current.
  1. In an electron dot diagram, each dot represents a(an) ______.
  1. In the binary ionic compound potassium bromide, KBr, the element that forms cations is ______.
  1. The chemical formula for calcium chloride, MgCl2, shows that the compound contains two ______ions for every ______ion.
  1. You are given the melting points of three unknown substances and asked to predict which is an ionic compound. You would select the compound with the ______melting point.
  1. An ionic compound consists of cation and ions arranged in a structure called a ______.
  1. When sodium and iodine react, they form an ionic compound called sodium ______.
  1. In ionic compounds, the sum of the charges of all the cations and anions must be ______.
  1. In a periodic table that included electron dot diagrams, in which column would the diagrams contain more dots—Group 2A (the alkaline metals) or Group 7A (the halogens)?
  1. In an electron dot diagram of rubidium, there is one dot. In an electron dot diagram of silicon, there are four dots. Which element would you expect to be more reactive?
  1. Fluorine is the most reactive nonmetal. To fluorine’s immediate right in the periodic table is neon, a noble gas that does not form chemical bonds. Explain this contrast in reactivity in terms of atomic structure.

Na /

Si

/ I / N
Ar /

Be

/ Al / O
Write the formulas of all of the compounds that can be made by combining each of the cations with each of the anions listed. Name each compound formed.
CATIONS / ANIONS
Na+ / O2-
Mg2+ / N3-
Al3+ / F-
  1. Draw the electron dot diagrams for the following atoms.
  1. Fill in the following table.

Atom / ion formed / ion symbol
Cesium / Cesium ion / Cs+
Potassium
Calcium
Iodine
Nitrogen
Sulfur
Neon
Aluminum
Strontium
Fluorine