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Chemistry

Don't forget to study those terms! ;)

QuestionAnswer
What is a significant figure? Those digits that carry meaning and contribute to the precision of a measurement.
What is the mass of Earth in scientific notation? 5.98x10^24 kg
What is the mass of one electron in scientific notation? 9.1x10^-31 kg
What is it called when one substance breaks down into two or more simpler substances? Decomposition
What is it called when one element replaces another in a compound? Single Displacement
When does neutralization occur? When a solution of an acid and a base are mixed.
What happens when a metal undergoes corrosion? It loses electrons to form cations.
What does it mean to be oxidized? Loss of electrons.
What does it mean to be reduced? Gain of electrons.
Do nonmetals usually have negative or positive oxidation numbers? Negative.
What does aqueous mean? Dissolved in water.
True or False? The number of elements can be balanced by changing coefficients of compounds. True.
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.
What do we call a well-defined example of a chemical change? A chemical reaction.
What is the smallest whole number ratio of elements in a compound? Empirical Formula.
What is density? Mass per unit volume.
What is the SI unit for temperature? Kelvin or K.
100 degrees Celsius is equivalent to how many degrees Fahrenheit? 212 degrees Fahrenheit.
What degree in Celsius does water freeze? 0 degrees Celsius.
What degree in Celsius does water boil? 100 degrees Celsius.
What is mass? The amount of matter in an object.
What is an exact quantity people agree to use for comparison? A standard.
What is volume? The amount of space occupied by an object.
True or False? Oxyacids contain oxygen. True.
What does a chemical formula indicate? The elements in a compound and the ratio of those elements.
What is a chemical bond? A force that holds atoms together in a compound.
In a(n) ______ electrons are transferred, creating opposite charges that attract. Ionic bond.
What kinds of bonds usually occur between elements at opposite ends of the periodic table? Ionic bonds.
A negative ion is also referred to as Anion.
A positive ion is also referred to as Cation.
What is an ion? An atom that has gained or lost electrons.
What is a shorthand method of showing the number of valence electrons? Electron dot structure.
What are the rows on the periodic table called? Periods.
Define ductile. Can be drawn into wires.
What do we call something that can be easily bent or pounded into sheets? Malleable.
What do we call the elements that are found along the "stair steps" line of the periodic table? Metalloids.
What famous Russian Chemist designed the first periodic table? Dimitri Mendeleev.
What famous English scientist developed the modern periodic table in 1913 and based the position of the elements on their atomic numbers? Mosely.
What are the columns on the periodic table called? Groups or Families.
True or False? Elements in a group have similar properties. True.
True or False? The group number indicates the number of atoms. False. The group number indicates the number of valence electrons.
Define allotrope. The same element or isotope with a different formation.
What is the amount of time is takes for half of a sample of an isotope to break down into other elements? Half-life.
What are electrons in an outer level or sub-level that are involved in reactions called? Valence electrons.
What makes up protons and neutrons? Quarks.
What famous scientist won two Nobel Prizes in chemistry and coined the term "Radiation"? Marie Curie.
What famous scientist discovered the neutron in 1932? James Chadwick.
Define Chemistry. A science that deals with the materials of the Universe and the changes that these materials undergo.
How many known elements are arranged in the periodic table? 118.
How many known elements occur naturally? 88.
What are the smallest units of elements with properties of the element? Atoms.
What are the two most abundant elements in the Universe? Hydrogen and Helium.
What is the element symbol of Copper? Cu.
What is the element symbol of Magnesium? Mg.
What is the element symbol of Sodium? Na.
What is the element symbol of Potassium? K.
What is the element symbol of Iron? Fe.
Name this element: Ni Nickel.
Name this element: Zn Zinc.
Name this element: B Boron.
Name this element: Ar Argon.
Name this element: He Helium.
Name this element: Co Cobalt.
What is the element symbol of Phosphorus? P.
What is the element symbol of Gold? Au.
Name this element: Hg Mercury.
Name this element: Sn Tin.
What is the element symbol of Silver? Ag.
What charge does Oxygen have? -2
What charge does Hydrogen have? +1
What charge does Aluminum have? +3
What charge does Sulfur have? -2
What is the BEST CLASS EVER?! CHEMISTRY!
Created by: 15fiskri
 

 



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