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RH MID TERM REVIEW F
Chemistry 1405 Mid Term Vocabulary Review
| Question | Answer |
|---|---|
| How many protons are in an atom of sodium? | eleven |
| What two types of matter are classified as pure substances? | elements or compounds |
| How many atoms of carbon are in one molecule of sucrose (table sugar), C12H22O11? | twelve |
| What is the atomic number of atoms of calcium? | twenty |
| How many liters are in 250.0 mL? | 0.250 Liters |
| How many grams are in 25.0 kg? | 25,000 grams |
| What charge will an ion made from an alkali metal have? | positive one |
| What group do sodium, potassium, and lithium belong to? | alkali metals |
| What group do calcium, strontium, and barium belong to? | alkaline earth metals |
| What group do fluorine, chlorine, and bromine belong to? | halogens |
| What group do helium, neon, and argon belong to? | noble gases |
| What charge will an ion made from a halogen have? | negative one |
| What charge will an ion made from an alkaline earth metal have? | postive two |
| What charge will the oxide ion have? | negative two |
| What is the approximate room temperature in Celsius? | around twenty degrees Celsius |
| How many valence electrons are in an atom of calcium? | two |
| How many valence electrons are in an atom of bromine? | seven |
| What is meant by the term polar molecule? | This type of molecule has an unequal distribution of electrons. |
| What is the shape and polarity of the water molecule? | bent and polar |
| What is the molar mass of water, H2O? | 18 grams/mole |
| What happens in general when an atom is oxidized? | The atom loses electrons. |
| What happens in general when an atom is reduced? | The atom gains electrons. |
| Generally which elements are responsible for the colors in gemstones? | transition elements |
| How many bonds does a carbon atom form? | four bonds |
| How many valence electrons are in a carbon atom? | four valence electrons |
| How many electrons are involved in a double bond between two carbon atoms? | four electrons are shared in a double bond |
| How many dots would be drawn around the symbol for nitrogen to show its electron dot structure? | five dots representing five valence electrons |
| How many total valence electrons are in one molecule of ethanol, C2H5OH | twenty total valence electrons |
| What in general is the pH of an acidic solution? | a pH less than seven |
| What in general is the pH of a basic solution? | a pH greater than seven |
| What would a pH of 1 indicate? | a strongly acidic solution |
| What would a pH of 8 indicate? | a moderately basic solution |
| What are the names of three common strong acids? | hydrochloric acid, sulfuric acid, and nitric acid |
| What does ppm stand for? | parts per million |
| What are the two products when a hydrocarbon burns assuming no side reactions? | carbon dioxide and water |
| What is the other necessary reactant when a hydrocarbon is burned? | oxygen |
| What is the freezing point of water in degrees Celsius? | zero degrees Celsius |
| What is a hypothesis in the scientific method? | an educated guess or possible explanation |
| What are most elements on the periodic chart when classified as either metals or nonmetals? | metals |
| How many double bonds between carbons are in a saturated carbon molecule? | zero |
| Is a triple bond or a single bond between carbons harder to break? | triple bond |
| What is present in solution if a substance is an electrolyte? | positive and negative ions |
| Is the density of salt water greater or less than one gram per milliliter? | greater than one gram per milliliter |
| What are some common pollutants in air? | carbon monoxide, sulfur dioxide, ozone, and nitrogen dioxide |
| What are the elements contained in bleach, NaOCl? | sodium, oxygen, and chlorine |
| What ions are the common hard ions in water? | calcium ions, magnesium ions, and iron ions |
| What is the formula for table salt? | NaCl |
Created by:
rshowe
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