CHEMISTRY. ATOMS

Let’s make a booklet.

Agenda 11.28 Bell ringer New booklet

construction New notes. Q.A for tickets

Bell ringer: Look around the room and describe 3 or 4 things that are not made of metals.

4 sentences.

Wednesday, November 28, 2012 7-5.1 Recognize that matter is

composed of extremely small particles, too small to be seen with a classroom microscope, called atoms

7-5.2 Classify matter as element, compound, or mixture on the basis of its composition. 7-5.3 Compare the physical properties of metals and nonmetals.

Chemistry basics 1. Matter is composed of extremely

small particles, too small to be seen with a classroom microscope, called atoms.

2. Atoms are the smallest part of an element that has the chemical properties of the element.

3. A single atom has mass and takes up space.

4. Pure substances are elements and compounds.

5. Elements Elements are pure

substances that cannot be changed into simpler substances.

Elements are composed of one type of atom.

6. Compounds Compounds are pure

substances that are composed of two or more types of elements that are chemically combined.

Compounds can only be changed into simpler substances called elements by chemical changes

7. One way that two or more atoms can combine is to form a molecule.

8. Mixtures Mixtures are composed of two or more different substances that retain their own individual properties and are combined physically (mixed together).

Mixtures can be separated by physical means (filtration, sifting, or evaporation).

Mixtures may be heterogeneous or homogeneous.

9. In a heterogeneous mixture, which is not uniform throughout, the parts can be visibly distinguished.

10. In a homogenous mixture, which is uniform throughout, the substances are evenly mixed and cannot be visibly distinguished. The particles of the substances are so small that they cannot be easily seen.

11. Another name for a homogeneous mixture is a solution.

Periodic Table 12. There is a zigzag line on the right

side of the table of the periodic table . There are two sections of elements on the periodic table, metals and nonmetals.

13. Metals A major classification

of elements generally located on the left side of the zigzag line on the periodic table.

Examples of metals are: Sodium (Na), Calcium (Ca), Iron (Fe), and Aluminum (Al). The majority of elements are metals.

14. Nonmetals A major

classification of elements generally located on the right side of the zigzag line on the periodic table.

Examples of nonmetals are: Chlorine (Cl), Oxygen (O), Sulfur (S), and Iodine (I).

11.29.12

7-5.3Compare the physical properties of metals and nonmetals.

Bell ringer: Describe three metal objects without naming them.

Homework collection

Notes

15. Characteristics of metals A. Luster - Having a shiny surface

or reflecting light brightly B. Conductors - Heat and electricity

move through them easily C. Malleable - Ability to be hammered

into different shapes D. Ductile - Ability to be drawn into a

wire E. High density - Heavy for their size

Luster - Having a shiny surface or reflecting light brightly

Conductors - Heat and electricity move through them easily

Malleable - Ability to be hammered into different shapes

Ductile - Ability to be drawn into a wire

High density – means Heavy for their size

16. Physical properties of nonmetals include:

A. Dull - Not shiny

B. Nonconductors - Heat and electricity do not move through them easily, (insulator)

C. Brittle - Break or shatter easily (solids)

Dull—No shine

Non conductor-- insulator

Brittle—breakable

Chemical Symbols 17. Elements are

made up of one kind of atom and has a unique symbol.

18. Symbols are usually a 1 or 2 letters that stand for the name of the substance. The first letter is always capitalized and the second, if there is one, is lower case.

Common Chemical SymbolsElement

Symbol

Sodium NaChlorine ClHydrogen

H

Oxygen OCarbon CNitrogen

N

19. Formulas and names of substances

(,,,, and) and the names and symbols for the elements listed in the elements Sodium (Na), Chlorine (Cl), Hydrogen (H), Oxygen (O), Carbon (C), and Nitrogen (N). For example, when students see the formula H2O, they should be able to recognize that this is water.

Compounds are composed of more than one element and their formulas have more than one type of symbol showing the different elements that compose the compound.

Common names

formulas

table saltsimple sugaroxygen gascarbon dioxidenitrogen gas