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Matter

QuestionAnswer
Where are transition metals located on the periodic table? In the middle and at the bottom
Where are the least reactive elements on the periodic table? Far right hand
Where are the most reactive elements on the periodic table? Far left hand
Where are the metalloids on the periodic table? On the zigzag line
Where are the nonmetals on the periodic table? Upper right area (and hydrogen)
Where are the metals on the periodic table? On the left of the zigzag line
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; rows
What does a group represent? Number of valence electrons; columns; also called a family
What is the definition of mass? The amount of matter in an object
What is the Law of Conservation of Matter? Matter is not created or destroyed
What is the definition of density? How tightly compacted an object is
What is the formula for density? Mass/volume Usually shows up as g/mL
What are the types of physical properties? Texture, color, odor, melting point, boiling point, density, solubility, size, hardness, luster, phase of matter, mass, and conductivity
What are the types of chemical properties? Reactivity, toxicity, and flammability
What is the definition of melting point? The temperature at which a solid changes to a liquid; same temperature as the freezing point
What is the definition of combustibility? How easily an object will burn
What is the definition of reactivity? How easily an atom reacts or joins with another atom
What is the definition of boiling point? The temperature at which a liquid turns into a gas (vapor)
What is a solute? Something dissolved in something else
What is a solvent? The liquid that the solute is dissolved in
What is a solution? A mixture where the solute is distributed; all parts are the same
What is a homogeneous mixture? All parts are the same; a pure substance
What is a heterogeneous mixture? Parts are different; can be separated easily
What does the atomic number represent? Number of protons (usually the number of electrons too)
What does the atomic mass represent? Number of protons plus neutrons
What is a noble gas? Located on the far right; they are the least reactive
How do you find the number of neutrons? Round the atomic mass to the nearest whole number, then subtract the atomic number from it
What are reactants and products? Reactants are what join together and products are the new substance created
Created by: MikaelaL