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Matter

QuestionAnswer
Where are transition metals located on the periodic table? its in the middle and at the bottom
Where are the most reactive elements on the periodic table? far left hand column
Where are the metalloids on the periodic table? along the zig zag line
Where are the nonmetals on the periodic table? on the far right plus hydrogen
Where are the metals on the periodic table? everywhere on the left of the table except the for hydrogen
What is the smallest part of an element? an atom
What is the smallest part of a compound? a molecule
What does a period represent? energy levels. (row)
What does a group represent? number of valence electrons (also called a family) Its a column
What is the definition of mass? the amount of matter in a object.
What is the Law of Conservation of Matter? matter can be neither created nor destroyed
What is the definition of density? how tightly packed something is
What is the formula for density? mass divided by volume
What are the types of physical properties? color, odor, size, hardness, luster, phase of matter, mass, density, boiling point, melting point, solubility, conductivity
What are the types of chemical properties? reactivity, combustibility, toxicity
What is the definition of melting point? temperature at which a substance changes from a solid ti a liquid; the same temperature as the freezing point
What is the definition of combustibility? the ability a substance has to burn
What is the definition of reactivity? how easily an atom has a chemical reaction with another atom
What is the definition of boiling point? the point at which a substance changes from a liquid to a gas (vapor)
What is a solute? a substance that is dissolved in another substance (suger)
What is a solvent? the liquid in which a solute is dissolved (water)
What is a solution? when substances are evenly mixed togehter
What is a homogenous mixture? all parts are the same
What is a heterogeneous mixture? parts that are not the same
What does the atomic number represent? number of protons and electrons
What does the atomic mass represent? the number of protons + neutrons
What is a noble gas? a group of elements that are particularly non reactive (far right)
How do you find the number of neutrons? the mass number by rounding the atomic mass to the nearest whole number. subtract the atomic number from this #
What are reactants and products? the substances you have at the beginning are reactants. then when the reactants are complete you have a new substance which is called a product.
where are the least reactive elements on the periodic table on the far right of the table
Created by: AlanaM23