Element. Molecule. atoms. They are organized. Alkali Metals. The basic building blocks of all matter. Can be found on the periodic table.

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1 Element The basic building blocks of all matter. Can be found on the periodic table. Molecule A unit of two or more atoms joined together by a chemical bond atoms The smallest particle of an element that still has the properties of that element. They are organized When looking at compounds through an electron scanning microscope what do scientists observe about the atoms? Alkali Metals The first family in the periodic table, they are highly reactive metals that are never found uncombined in nature. They are shoft and shiny. Sodium Potassium 1/10

2 Alkaline Earth Metals They are not as reactive as group 1 but still react easily and are not found uncombined in nature. They are fairly hard, brigh white and good conductors of electricity. Magnesium Calcium Noble Gases Stable gases that rarely react at all and do not form compounds readily. The do not gain or share electron easily because the have full outer shells. Helium Neon Halogens React violently with elements from group 1. Fluorine Bromine Transition Metals These are the most familiar of the metals. Most are hard and shiny. They are good conductors of electricity. Iron Copper Negative The typ of charge an electron has. 2/10

3 Positive The type of charge a proton has. Neutral The type of charge a neutron has. Element Carbon cannot be broken down into anything simpler by chemical means, so carbon must be an... Draw a model of an oxygen molecule. Draw a picture of a salt molecule. 3/10

4 Carbon Organic means living. Which element occurs in every organic compound? Highly reactive One valence electron What is true for the elements in the far left column of the periodic table? Metallic Solids Under ordinary, room temperature conditions, the greatest number of elements are... Chemical A change in the way the number or kind of atoms are bonded together. Chemical A new substance is formed. 4/10

5 Physical A change in phase or state of matter. Chemical Iron reacts to form rust. Physcial Steel is attracted to a magnet. ph; Flammability; Color Change; Temp Change; Gas formation; percipitation; Light What are the evidences of a chemical change? Physical Boiling water 5/10

6 Property What you use to identify a substance. Different Properties How do the chemicals before and after a chemical reaction differ from chemicals AFTER a chemical change? Product The new substance formed during a chemical reaction. Reactant The substances that go into a chemical reaction. Law of conservation of matter. States that matter cannot be created or destroyed. The amount of matter remains constant. 6/10

7 Atomic Mass The sum of the number of protons and neutrons in the nucleus of an atom is called the... Similiar Properties Each family or group of elements in a vertical column of the period table has elements with... 1 How many valence electrons do the atoms in the Alkali family have? Alkali metals The first family in the periodic table are the... Alkaline Earth Metals The second family in the periodic table are the... 7/10

8 Halogens Fluorine, Chlorine and Bromine are in which family? Noble Gases The last family in the periodic table are the... Flammability The type of evidence of a chemical reaction that involved fire is called.. Precipitation The type of evidence of a chemical reaction that involves a solid being formed from liquids. ph The type of evidence of a chemical reaction that involved a change in acidity. 8/10

9 Chemical Physical or Chemical Property? Property determined by the arrangement of atoms in the molecules making up an object. Physcial Properties that are observable. Chemcial Physical or Chemical Property? Reactivity Physical Physical or Chemical Property? Boiling point Physical Physical or Chemical Property? Density 9/10

10 Soluble When testing a new substance Steven found it to be reactive, flammable, soluble and explosive. Which is NOT a chemical property? 10/10