Multiple Choice
Which subatomic particle is found in the nucleus of an atom and has a positive charge?
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1. Intro to General Chemistry
Classification of Matter
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Which of the following pairs of chemical formulas and names are correctly matched for ionic compounds?
A
MgO - Magnesium Sulfide
B
K2SO4 - Potassium Nitrate
C
NaCl - Sodium Chloride
D
CaF2 - Calcium Oxide
Verified step by step guidance1
Step 1: Understand that ionic compounds are formed from positive and negative ions. The name of the compound is derived from the names of these ions.
Step 2: Break down each chemical formula into its constituent ions. For example, MgO consists of Mg2+ and O2- ions.
Step 3: Match the ions to their correct names. MgO should be Magnesium Oxide, not Magnesium Sulfide. Similarly, K2SO4 should be Potassium Sulfate, not Potassium Nitrate.
Step 4: Verify the correct chemical formula and name pair. NaCl is correctly matched with Sodium Chloride, as Na+ is sodium and Cl- is chloride.
Step 5: Check the remaining pair, CaF2. It consists of Ca2+ and F- ions, which correctly corresponds to Calcium Fluoride, not Calcium Oxide.
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