Lessons 1 & 2
positively charged particle in the nucleus of an atom
What is a proton?
a physical change does NOT change the matter's _________
What is identity?
a small particle that is a building block of matter
What are atoms?
anything that has mass and takes up space
What is matter?
a change in size, shape, form, or state of matter in which the matter's identity stays the same
What is a physical change?
part of a homorgeneous mixture or solution that dissolves the smaller substance or solute
What is the solvent?
the opposite of boiling
What is condensation?
matter changing from gas directly to a solid
What is deposition?
matter with a composition that is always the same; 2 types: elements and compounds
What are substances?
a change directly from the solid to the gaseous state without becoming liquid
What is sublimation?
CO2
tell the amount of carbon atoms and oxygen atoms in this compoundCarbon-1 and Oxygen-2
the temperature of a substances stays _______ for as long as it takes for a solid to turn into a liquid or a liquid to turn into a gas
What is constant?
ability of one substance to dissolve in another
What is solubility?
a mixture in which substances are evenly distributed throughout the mixture; solution
What is a homogeneous mixture?
a change that occurs when one or more substances change into entirely new substances with different physical and chemical properties
What is a chemical change?
Name 2 size-independent properties.
What are density, boiling point, melting point, conductivity, solubility, or magnetism?
Give 2 examples of chemical properties.
What are ability to burn, rot, or rust?
negatively charged particle that is found outside the nucleus
What is an electron?
the mass per unit volume of a substance
What is density?
a characteristic of matter that can be observed as it changes to a different type of matter
What is a chemical property?
True or false:
All mixtures are solutions.
What is false?
this law states that no matter is gained or lost during a physical or chemical change
What is law of conservation of mass?
In a chemical reaction, the substances present before the reaction occurs are called ___________
What are reactants?
a type of substance containing atoms of two or more elements chemically combined
What is a compound?
the amount of a substance in a given volume
What is concentration?