Structure of Matter
The Simplest Matter
Properties and changes of matter
Physical and Chemical Changes
Chemical formulas and equations
100
Matter is anything that has mass and takes up space.
What is Matter?
100
Element is matter made of only one kind of atom.
What is an element?
100
The properties of matter are physical and chemicals. They classified into solid, liquid and gaseous.
What are the properties of matter and how are they classified?
100
A physical change is one in which the form or appearance of matter changes, but not it composition.
What is a physical change?
100
The reactants are the substances that exist before the reaction begins and the products are the substance that form as a result of a reaction.
How do you identify the reactants and products in a reaction?
200
We can tell that something was made up of matter if takes up space and has mass.
How can we tell that something was made up of matter?
200
The periodic table arranges and displays all known elements in orderly way, each element has a chemical symbol.
How is the periodic table used to identify the basic organization of elements?
200
A physical property is a characteristic that you can observe without changing or trying to change the composition of the substance.
What is a physical property?
200
The physical changes are: changing shape, dissolving and changing state.
What are the physical changes?
200
The law of conservation of mass requires that the same number of atoms of each element be in the products as in the reactants of a chemical equation. This is true in every balanced chemical equation.
How does a balanced chemical equation support a Law of Conservation of Mass?
300
The Law of Conservation of Matter states that matter is not created or destroyed, it only changes form.
What states the Law of Conservation of Matter?
300
The elements are classified in metals, nonmetals, and metalloid.
How the elements are classified?
300
A chemical property of matter is a characteristic that cannot be observed withouth altering the substance.
What is a chemical property?
300
Chemical changes is when the substances are changed into different substances and the composition of substances change.
What is a chemical changes?
300
A Chemical equations tells chemits at a glance the reactants, products, physical state and the properties of each substance present.
What a chemical equation tell chemist?
400
Matter is made up of atoms.
What is matter made up?
400
Metals are shiny or metallic luster and are good conductor of heat and electricity. Nonmetals are elements that are usually dull in appearance. Most are poor conductor of heat and electricity.
How do the physical properties of metals and nonmetals differ?
400
Size-depeendent properties are volume, mass, and weight.
What are size dependent properties?
400
Some signs of chemical changes are altered, color, energy, odor and formation of gas or solid.
Which signs of chemical changes are altered?
400
Physical changes in a substance affect only physical properties. Chemical changes produce new substance that have properties different from those the original substance.
How do you compare the physical and chemical changes in a chemical reaction?
500
Atoms are made up of smaller parts called protons, neutrons, and electrons.
What are atoms made up?
500
Metalloids are elements that have characteristic of metals and nonmetals. All Metalloids are solids at room temperature. Some are shiny and many are conductors, but they are not as good as conducting heat and electricity as metals are.
What are the characteristics of metalloids?
500
Size-independent properties are properties such as density, solubility,boiling and melting points, and ability to atract a magnet.
What are size independent properties?
500
Properties of acidic solutions are: sour taste, they can conduct electricity, are corrosive, are reactive with certains metals. Properties of basic solution:feel slippery, taste bitter, corrosive, contains ions, can conduct electricity, are not reactive with metals.
What properties distinguish acids from bases?
500
A chemical formula shows which element and how many atoms of each make up a compound.
How do you traslate the formulas and symbols of common substances?
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