Presentation on theme: "MATTER IS MADE OF ATOMS. INTRODUCTION TO MATTER. Atoms An ___________is the smallest basic unit of ________________. – Atoms are too small to be seen,"— Presentation transcript:
Atoms An ___________is the smallest basic unit of ________________. – Atoms are too small to be seen, but we can see large collections of atoms, such as people. – Atoms are so small that they cannot even be seen with a strong optical microscope.
Molecules When two or more atoms ______together, they make a particle called a _______________. A molecule can be made of __________numbers and types of atoms. A molecule is the smallest amount of a __________made of combined atoms that is considered to be that substance.
Atoms are always in motion. Regardless of the state of matter, atoms are always ____________. Atoms move the most freely in the _________state and the least freely in the _________state.
Atoms in the Solid State Atoms are very close together and vibrating off each other
MATTER COMBINES TO FORM DIFFERENT SUBSTANCES. INTRODUCTION TO MATTER
Matter can be pure or mixed. Most of the substances around you are ______________. – Examples: paper, lemonade A ________substance has only one type of component. A substance is considered pure if it contains only _______type of atom or single combination of atoms.
Matter makes up substances. ______________ are mixtures of a particular type. Elements, compounds, and mixtures are all substances.
Elements An ___________is a substance that contains only a singe type of ________. The __________of atoms does not matter as long as they are all the same type. Elements ___________be separated into other substances. – Examples: gold, silver, helium, oxygen
Compounds A _______________is a substance that consists of two or more different types of atoms ___________together. – Example: Table salt is a compound because it is made of sodium and chlorine.
Mixtures A __________is a combination of different substances that remain the same individual substances and can be separated by ____________means. – Example: A bowl of apples, oranges, and bananas can be separated by physically removing them from the bowl. Pictures from Chem 4 kids
Comparing Mixtures and Compounds Mixtures Compounds
Parts of a Mixture Homogenous Mixtures – when substances are _______spread throughout a mixture. – Examples: mixing sugar into a cup of water, homogenized milk Heterogeneous Mixtures – when substances are _______evenly spread throughout a mixture – Examples: soil, salsa
Homogeneous Mixture “ Homo ” means the same has the same uniform appearance and composition throughout; maintain one phase (solid, liquid, gas) Commonly referred to as solutions Example: Salt Water Notice the uniform appearance
Solution a mixture of two or more substances that is identical throughout can be physically separated composed of solutes and solvents the substance in the smallest amount and the one that dissolves in the solvent the substance in the larger amount that dissolves the solute Colloids (milk, fog, jello) are considered solutions Iced Tea Mix (solute) Water (solvent) Iced Tea (solution) Salt water is considered a solution. How can it be physically separated?
Heterogeneous Mixture “ Hetero ” means different consists of visibly different substances or phases (solid, liquid, gas) a suspension is a special type of heterogeneous mixture of larger particles that eventually settle Example: Trail Mix Notice the visibly different substances
Suspensions Properties Suspensions separate into layers over time Particles are larger than those in a solutions Examples: Sand in water, muddy water, salad