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Matter

mAtTEr

QuestionAnswer
Where are transition metals located on the periodic table? In the middle & the bottom
Where are the least reactive elements on the periodic table? Far right
Where are the most reactive elements on the periodic table? Far left
Where are the metalloids on the periodic table? The thirteenth group, making a staircase
Where are the nonmetals on the periodic table? Far upper right, & hydrogen
Where are the metals on the periodic table? The left side of metalloids
What is the smallest part of an element? The atom
What is the smallest part of a compound? The molecule
What does a period represent? Energy levels; rows
What does a group represent? Number of valence electrons, (group is also called family, in columns)
What is the definition of mass? Amount of matter in an object
What is the Law of Conservation of Matter? Matter is neither created nor destroyed
What is the definition of density? How tightly packed an object is
What is the formula for density? mass divided by volume (usually shows up as grams per milileter g/mL)
What are the types of physical properties? Color, phase, mass, density, odor, melting point, boiling point, hardness, luster (shiny), solubility (how easily it dissolves), and conductivity
What are the types of chemical properties? Combustibility, toxicity, and reactivity
What is the definition of melting point? The temperature at which something goes from being solid to liquid (same TEMPERATURE as the freezing point)
What is the definition of combustibility? The ability to burn
What is the definition of reactivity? How easily a chemical is combined
What is the definition of boiling point? The temperature at which something goes from liquid to gas
What is a solute? Substance dissolved in another substance
What is a solvent? Substance that the solute is dissolved in
What is a solution? The outcome of the solvent and solute, when the substances in the mixture are easily distributed
What is a homogeneous mixture? A mixture that has the same components throughout the substance (pure, Ex. Salt)
What is a heterogeneous mixture? A mixture that does not have the same components throughout the substance, ( can be easily separated, Ex. sand + water)
What does the atomic number represent? Protons in an element (also the neutrons, but the protons)
What does the atomic mass represent? Protons and neutrons in an element
What is a noble gas? Gasses that do not combine with other elements (least reactive; far right)
How do you find the number of neutrons? Round atomic mass to nearest whole number, then subtract atomic number
What are reactants and products? Reactants (left) are what is combined, products (right) are the new substances
Created by: ChimChim