Questions: Chemical formulas can have three components. a) The element symbols, which are represented by a single uppercase letter, or by an uppercase letter followed by a lowercase letter, tell you the types of elements in the compound. b) The subscript numbers written on the right-hand side of each element symbol. This tells you the number of atoms of this element in the molecule. If an element symbol has no subscript next to it, it means there is one atom of that element in the molecule. c) The charge symbols which surround some groups of atoms indicated by a superscript number and sign on the right-hand side of that bracket. The charge numbers of all of the atoms inside the bracket need to be considered. Record the number of each atom in each molecule, then record the total number of atoms in the molecule.

Chemical formulas can have three components. a) The element symbols, which are represented by a single uppercase letter, or by an uppercase letter followed by a lowercase letter, tell you the types of elements in the compound. b) The subscript numbers written on the right-hand side of each element symbol. This tells you the number of atoms of this element in the molecule. If an element symbol has no subscript next to it, it means there is one atom of that element in the molecule. c) The charge symbols which surround some groups of atoms indicated by a superscript number and sign on the right-hand side of that bracket. The charge numbers of all of the atoms inside the bracket need to be considered. Record the number of each atom in each molecule, then record the total number of atoms in the molecule.
Transcript text: Chemical formulas can have three components. a) The which are represented by a single uppercase letter, or represented by an Which are represented by a lowercasells you the types of elements in the compound. b) The $\qquad$ $\qquad$ hand side of each element symbol. This tells you the number of $\qquad$ of this element in the molecule. If an element symbol has no subscript next to it, c) The $\qquad$ which surround some groups of atoms ind by the to be_ $\qquad$ bers of all of the atoms inside the bracket need to be $\qquad$ - hand side of that bracket. the bracket found on the lower $\qquad$ Record the number of each atom in each molecule, then record the total number of atoms in the molecule:
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Solution

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Solution Steps

Step 1: Understanding Chemical Formula Components
  • Identify the elements in a chemical formula, represented by uppercase letters or an uppercase letter followed by a lowercase letter.
  • Determine the subscript numbers to the right of each element symbol, indicating the number of atoms of that element in the molecule.
  • Recognize brackets that group atoms together, where the subscript outside the bracket multiplies the number of each atom inside the bracket.
Step 2: Counting Atoms in NaOH
  • Sodium (Na) has 1 atom.
  • Oxygen (O) has 1 atom.
  • Hydrogen (H) has 1 atom.
  • Total number of atoms = 1 (Na) + 1 (O) + 1 (H) = 3.
Step 3: Counting Atoms in \(\mathrm{Li}_{2} \mathrm{SO}_{4}\)
  • Lithium (Li) has 2 atoms.
  • Sulfur (S) has 1 atom.
  • Oxygen (O) has 4 atoms.
  • Total number of atoms = 2 (Li) + 1 (S) + 4 (O) = 7.

Final Answer

\(\boxed{3}\) for NaOH, \(\boxed{7}\) for \(\mathrm{Li}_{2} \mathrm{SO}_{4}\)

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