Chem Review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the Periodic Table of Elements? | a tabular arrangement of the chemical elements, ordered by their atomic number (number of protons), electron configurations, and recurring chemical properties.
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| The atoms of an element that have different numbers of neutrons they are called | Isotopes
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| The Atomic Number of an element refers to | The Number of Protons
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| The Atomic Mass of an element refers to | The number of Protons AND Neutrons
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| The substance dissolved INTO a solvent | Solute
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| The substance that in which the solute is dissolved | Solvent
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| When 2 atoms share 1 or more electron pairs they are said to have a | Covalent Bond
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| When an atom loses or gains electrons it becomes electronically charged | Ionic Bonds
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| What scale helps to define whether a substance is base, neutral or acid | pH scale
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| Where does "Base" fall on the pH scale? | 14
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| Where does "Acid" fall on the pH scale? | 0
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| Where does neutral fall on the pH scale? | 7
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| What is the pH scale based on? | hydrogen ion concentration in water (Many chemical reactions in living cells involve exchanges of hydrogen ions. Therefore measuring this can help you determine the pH easily).
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| hydrogen ion concentration | the number of moles of hydrogen ions per cubic decimeter
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| What is a mixture in which one or more substances are uniformly distributed into another substance? | Solution
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| Salt Water is an example of | Aqueous Solution
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| In Salt Water which is the Solvent and which is the Solute? | Water is the solvent and Salt is the solute
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| In Sugar Water which is the solvent and which is the solute? | Water is the solvent and Sugar is the solute
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| Bleach has the pH of 12.5, this means based on the pH scale it is a | Base
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| Orange Juice has a pH of 3.5, this means based on the pH scale it is a | Halfway between neutral and acid, so definitely not a base
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| Healthy human saliva has a pH of 6.5-7.4 so it would be classed as a what based on the pH | Neutral
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| What are an example of weak bonds in nature (bonds which don't take a lot of energy to break) | Hydrogen bonds
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| Table salt is a compound which has the weak bond between the sodium and the chloride called | Ionic bond
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| Carbon dioxide is an example of what type of weak bond at work? | Covalent bond
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| Water is an example of a molecule with what type of covalent bond? | Polar covalent bond
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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