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Matter

QuestionAnswer
Where are transition metals located on the periodic table? In the middle and bottom
Where are the least reactive elements on the periodic table? Far right column
Where are the most reactive elements on the periodic table? on the far left
Where are the metalloids on the periodic table? To the right.
Where are the nonmetals on the periodic table? Far upper right and Hydrogen
Where are the metals on the periodic table? To the left of the zigzag line
What is the smallest part of an element? An atom of that element
What is the smallest part of a compound? molecule
What does a period represent? same energy level; rows
What does a group represent? same number of valence electrons (also called a family) ; columns
What is the definition of mass? how much matter is in an object
What is the Law of Conservation of Matter? Energy/Matter cannot be created nor destroyed
What is the definition of density? How tightly packed something is; mass/volume
What is the formula for density? mass/volume ( usually shows up as g/mL )
What are the types of physical properties? Density, Melting Point, Boiling Point, color, phase of matter, conductivity, size, hardness, odor, mass, luster, solubility
What are the types of chemical properties? Reactivity, Combustibility, Toxicity
What is the definition of melting point? temp. at which a substance changes from a solid to a liquid; the same temperature as the freezing point
What is the definition of combustibility? how easily something burns
What is the definition of reactivity? How easily an atom a chemical reaction
What is the definition of boiling point? The point in which an object boils
What is a solute? a substance that is dissolved in another substance
What is a solvent? The liquid in which a solute is dissolved
What is a solution? Substances in a mixture are evenly distributed; all parts are the same; a solute dissolved in a solvent
What is a homogenous mixture? A mixture that has the same combination of components (parts) throughout the entire mixture; a pure substance
What is a heterogeneous mixture? A mixture that is not the same throughout; can be easily separated
What does the atomic number represent? number of protons
What does the atomic mass represent? The umber of protons and neutrons in an elements atom
What is a noble gas? Last column of the periodic table that do not associate well with other elements
How do you find the number of neutrons? Round the atomic mass to the nearest whole number ( mass number) an then subtract the atomic number from this number
What are reactants and products? Reactants are substances in a chemical reaction that change into a new substance called products Reactants- beginning Products- new substance
Created by: Khailand
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