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Chapter 2: Q27 E (page 67)

Explain why the symbol for an atom of the element oxygen and the formula for a molecule of oxygen differ.

Short Answer

Expert verified

The symbol O is used to represent an atom/ element while O2 is the molecular formula.

Step by step solution

01

– Determine the definition of molecular formula

A molecular formula is a representation of a molecule that uses chemical symbols to indicate the type of atoms. It is also used as abbreviations for the names of compounds.

The molecular formula has subscript 2 which denotes the number of oxygen atoms in the molecule.

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Most popular questions from this chapter

The average atomic masses of some elements may vary, depending upon the sources of their ores. Naturally occurring, the boron consists of two isotopes with accurately known masses ( 10B, 10.0129 amu and 11B, 11.0931 amu). The actual atomic mass of boron can vary from 10.807 to 10.819, depending on whether the mineral source is from Turkey or the United States. Calculate the percent abundance leading to the two values of the average atomic masses of boron from these two countries.

Using the periodic table, identify the heaviest member of each of the following groups:

(a) Alkali metals

(b) Chalcogens

(c) Noble gases

(d) Alkaline earth metals

Use the build a molecule simulation (http://openstaxcollege.org/1/16molbuilding) to repeat Exercise 2.34, but build a molecule with three carbons, seven hydrogens, and one chlorine.

  1. Draw the structural formula of this molecule and state its name.
  2. Can u arrange these atoms to make a different molecule? If so, draw its structural formula and state its name.
  3. How are molecules drawn in (a) and (b) the same? How do they differs? What are they called (the type of relationship between these molecules, not their names)?

Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then further classify each as a main-group (representative) element, transition metal, or inner transition metal:

  1. Uranium
  2. Bromine
  3. Strontium
  4. Neon
  5. Gold
  6. Americium
  7. Rhodium
  8. Sulfur
  9. Carbon
  10. Potassium

Open theBuild an Atom simulation (http://openstaxcollege.org/l/16PhetAtomBld)(a) Drag protons, neutrons, and electrons onto the atom template to make a neutral atom of Oxygen-16 and give theisotope symbol for this atom.(b) Now add two more electrons to make an ion and give the symbol for the ion you have created.
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