Don't forget to study those terms! ;)
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 a significant figure? | Those digits that carry meaning and contribute to the precision of a measurement.
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| What is the mass of Earth in scientific notation? | 5.98x10^24 kg
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| What is the mass of one electron in scientific notation? | 9.1x10^-31 kg
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| What is it called when one substance breaks down into two or more simpler substances? | Decomposition
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| What is it called when one element replaces another in a compound? | Single Displacement
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| When does neutralization occur? | When a solution of an acid and a base are mixed.
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| What happens when a metal undergoes corrosion? | It loses electrons to form cations.
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| What does it mean to be oxidized? | Loss of electrons.
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| What does it mean to be reduced? | Gain of electrons.
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| Do nonmetals usually have negative or positive oxidation numbers? | Negative.
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| What does aqueous mean? | Dissolved in water.
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| True or False? The number of elements can be balanced by changing coefficients of compounds. | True.
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| True or False? The same number of elements must ONLY exist before a reaction. | False. The same number of elements must exist before AND after a reaction.
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| What do we call a well-defined example of a chemical change? | A chemical reaction.
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| What is the smallest whole number ratio of elements in a compound? | Empirical Formula.
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| What is density? | Mass per unit volume.
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| What is the SI unit for temperature? | Kelvin or K.
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| 100 degrees Celsius is equivalent to how many degrees Fahrenheit? | 212 degrees Fahrenheit.
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| What degree in Celsius does water freeze? | 0 degrees Celsius.
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| What degree in Celsius does water boil? | 100 degrees Celsius.
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| What is mass? | The amount of matter in an object.
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| What is an exact quantity people agree to use for comparison? | A standard.
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| What is volume? | The amount of space occupied by an object.
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| True or False? Oxyacids contain oxygen. | True.
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| What does a chemical formula indicate? | The elements in a compound and the ratio of those elements.
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| What is a chemical bond? | A force that holds atoms together in a compound.
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| In a(n) ______ electrons are transferred, creating opposite charges that attract. | Ionic bond.
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| What kinds of bonds usually occur between elements at opposite ends of the periodic table? | Ionic bonds.
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| A negative ion is also referred to as | Anion.
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| A positive ion is also referred to as | Cation.
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| What is an ion? | An atom that has gained or lost electrons.
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| What is a shorthand method of showing the number of valence electrons? | Electron dot structure.
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| What are the rows on the periodic table called? | Periods.
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| Define ductile. | Can be drawn into wires.
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| What do we call something that can be easily bent or pounded into sheets? | Malleable.
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| What do we call the elements that are found along the "stair steps" line of the periodic table? | Metalloids.
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| What famous Russian Chemist designed the first periodic table? | Dimitri Mendeleev.
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| What famous English scientist developed the modern periodic table in 1913 and based the position of the elements on their atomic numbers? | Mosely.
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| What are the columns on the periodic table called? | Groups or Families.
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| True or False? Elements in a group have similar properties. | True.
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| True or False? The group number indicates the number of atoms. | False. The group number indicates the number of valence electrons.
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| Define allotrope. | The same element or isotope with a different formation.
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| What is the amount of time is takes for half of a sample of an isotope to break down into other elements? | Half-life.
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| What are electrons in an outer level or sub-level that are involved in reactions called? | Valence electrons.
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| What makes up protons and neutrons? | Quarks.
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| What famous scientist won two Nobel Prizes in chemistry and coined the term "Radiation"? | Marie Curie.
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| What famous scientist discovered the neutron in 1932? | James Chadwick.
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| Define Chemistry. | A science that deals with the materials of the Universe and the changes that these materials undergo.
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| How many known elements are arranged in the periodic table? | 118.
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| How many known elements occur naturally? | 88.
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| What are the smallest units of elements with properties of the element? | Atoms.
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| What are the two most abundant elements in the Universe? | Hydrogen and Helium.
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| What is the element symbol of Copper? | Cu.
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| What is the element symbol of Magnesium? | Mg.
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| What is the element symbol of Sodium? | Na.
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| What is the element symbol of Potassium? | K.
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| What is the element symbol of Iron? | Fe.
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| Name this element: Ni | Nickel.
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| Name this element: Zn | Zinc.
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| Name this element: B | Boron.
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| Name this element: Ar | Argon.
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| Name this element: He | Helium.
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| Name this element: Co | Cobalt.
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| What is the element symbol of Phosphorus? | P.
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| What is the element symbol of Gold? | Au.
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| Name this element: Hg | Mercury.
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| Name this element: Sn | Tin.
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| What is the element symbol of Silver? | Ag.
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| What charge does Oxygen have? | -2
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| What charge does Hydrogen have? | +1
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| What charge does Aluminum have? | +3
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| What charge does Sulfur have? | -2
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| What is the BEST CLASS EVER?! | CHEMISTRY!
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