Presentation on theme: "DEFINE PHYSICAL PROPERTIES AND LIST AT LEAST 3 EXAMPLES P. 94."— Presentation transcript:
DEFINE PHYSICAL PROPERTIES AND LIST AT LEAST 3 EXAMPLES P. 94
An observable property of matter that can be determined without changing the substance. Ex: color, density, luster, odor, BP, MP
HOW IS A PHYSICAL CHANGE DIFFERENT FROM A CHEMICAL CHANGE? P. 94
In a physical change, the substance remains chemically identical. In a chemical change, a new substance is formed.
DEFINE CHEMICAL PROPERTIES. P. 94
Properties that require a change in the chemical makeup to observe. Ex: flammability
__________ __________, A RUSSIAN CHEMIST PUBLISHED THE FIRST PERIODIC TABLE IN 1869. P. 100
DEFINE PHYSICAL CHANGES AND LIST AT LEAST 3 EXAMPLES. P. 94
A change results in the same substance in the end. Ex: ripping paper, changing states of matter
IN THE MODERN PERIODIC TABLE, ELEMENTS ARE PLACED IN SEQUENCE ACCORDING TO ______________________. P. 102
Increasing atomic number
DEFINE CHEMICAL CHANGES AND LIST AT LEAST 3 EXAMPLES. P. 94
Changes that result in the formation of a new substance with different properties ex: burning a piece of paper, frying an egg, food spoiling
DEFINE PERIODS P. 103
The horizontal rows in the periodic table. Properties are NOT similar in periods.
DEFINE A GROUP (FAMILY) OF ELEMENTS. P. 105
Family or group: Same number of electrons in outer (valence) shell Similar chemical properties Period: Same number of energy levels
IDENTIFY THE ATOMIC NUMBER AND THE AVERAGE ATOMIC MASS OF THE ELEMENT BELOW P. 104 7 N 14.01
Atomic # is 7 Atomic Mass is 14.01
STUDY YOUR PERIODIC TABLE – KNOW THE LOCATION OF THE METALS, NON METAL AND METALLOIDS -KNOW THE CHARGES ON THE ELEMENTS IN GROUPS 1A, 2A, 3A, 4A, 5A, 6A, 7A, 8A (NOTES)
+1 +2 +3 +/-4 -3 -2 -1 0
STUDY YOUR ELEMENT FLASH CARDS FROM 1 ST QUARTER OR THE CHART ON P. 97 IN YOUR BOOK
DESCRIBE THE PROPERTIES OF A METAL (NOTES)
Shiny 'metallic' appearance Solids at room temperature (except mercury) High melting points High densities Malleable Ductile Thermal conductors Electrical conductors Electron losers
What are the rules for correctly writing a chemical symbol.
All have capital letters, some have a capital and a lowercase letter
Describe the properties of a non metal.
Poor thermal conductors Poor electrical conductors Brittle solids Little or no metallic luster Gain electrons easily Most are gases at room temperature Vary in color
Using your periodic table, predict the formula for the compound formed from a.C and F d. Al and S b.Ca and Br e. Fe +2 and O c.K and CL f. Fe +3 and O
CF 4 CaBr 2 KCl Al 2 S 3 FeO Fe 2 O 3
Describe the properties of a metalloid.
They have some properties of metals, some properties of nonmetals
What is the name of a compound formed when A. Fe +2 combines with O B. Fe +3 combines with O P 35
Cation AnionFormula Mg +2 OH – NH +4 NO 3 - Ca +2 PO 4 -3
Cation AnionFormula Mg +2 OH – Mg(OH) 2 NH 4 +1 NO 3 1 - NH 4 NO 3 Ca +2 PO 4 -3 Ca 3 (PO 4 ) 2
How does a balanced equation reflect the Law of Conservation of Matter?
The number of individual atoms of elements on the reactant side must equal the number of atoms in the product side Matter can’t be created or destroyed
Name the seven diatomic elements and correctly write their symbols.
H 2, N 2, O 2, F 2, Cl 2, Br 2, I 2
2 H 2 O ___________ ^ ____________ label the subscript and the coefficient.
2 H 2 O Subscript Coefficient
CH 4 + 2O 2 ---> CO 2 + 2H 2 O In the above equation, the reactants are found on the _________ side while the products are found on the _________ side of the equation.
In the above equation, the reactants are found on the LEFT side while the products are found on the RIGHT side of the equation.
In Chemistry, a _______ is defined as a unit for counting atoms and molecules. P 135
Complete an atom inventory for the Equation below and use it to balance the equation. ___ C 3 H 8 + ___O 2 ---> ____CO 2 + __H 2 O
__ C 3 H 8 + 5 O 2 ---> 3 CO 2 + 4 H 2 O 3 C 3 8 H 8 10 O 6+4=10
There are _____ x _____ particles in one mole of any substance (Avogadro’s number.) P 135
There are 6.02x 10 23 particles in one mole of any substance
Find the molar mass of : A. N 2 B. C 2 H 22 O 11 C. CuFeS 2
N 2 =14 x2= 28.0g/mole C 12 H 22 O 11 =144 + 22+ 176=342g/mole CuFeS 2 =63.5+55.8+64.2= 183.5g/molr
Define renewable resources P 145
Resources that are replenished readily by natural processes ex: trees, animals, cotton
Determine the % composition of Cu in CuFeS 2. P. 140
63.55/183.54 x100%= 34.62% Cu
Define nonrenewable resources. P 145
Resources that are not easily replenished by nature, or take a long time to replenish ex: crude oil, natural gas, precious metals
Describe the composition of a U.S. penny A. Pre- 1982 B. Post- 1982 *Review your shrinking it rich lab P 96
Pre-1982=all Copper Post-1982= mainly Zinc with a Copper coating
Define recycling P 146
changing a product’s form to make a new product ex: Al cans, glass
Bldg Skills # 5 p.121 Answer questions 1 a, b, c and 2 a, b, c,
Define reusing P 145
Using a product for the same use or another use before it is discarded ex: coffee can as a pencil cup, 2L bottle bird feeder
Define reducing P 145
Cutting down on the amount of material used ex: reducing thickness of Al cans and car doors, double sided dittos
A liquid is a state of matter that has definite ________ but no ______________________. It will take and __________________________.
A liquid is a state of matter that has definite volume but no definite shape. It will take on the shape of its container
What is a polyatomic ion ? P.33
A ion (charged) made up of many atoms
Define atom Name the particles that make up an atom and their location in the atom. P 32
An atom is the smallest unit of an element that maintains that element’s properties Proton=+1 charge, in the nucleus Neutron= 0charge, in the nucleus Electron=-1 charge, in the electron cloud around the nucleus
Describe a suspension P 25
A heterogeneous mixture containing large particles that settle to the bottom of a container. Ex: Italian dressing
How is an ion different from an atom?P 32
An atom contains equal numbers of protons and electrons. (no overall charge) An ion has lost or gained electrons to become electrically charged. (+ or -)
Describe a colloid P 25
A heterogeneous mixture that has small particles that don’t settle out of the mixture. It shows the Tyndall effect ex: milk
What is a cation? P 33
A positively charged ion resulting from a LOSS of electrons
Describe a solution P 25
A homogeneous mixture that is uniform throughout, and appears as if it were one substance. Ex: salt-water, cool-aid
What is an anion? Pg 33
A negatively charged ion that results from a GAIN of electrons
What is the Tyndall effect and through which type of mixture can you observe it? Pg. 25
Tyndall effect is the scattering of light by the particles in a mixture. It determines a colloid
In a solution, the __________ is the dissolving agent, and the __________ is the dissolved substance. Pg. 45
In a solution, the solvent is the dissolving agent, and the solute is the dissolved substance.
Describe a polar molecule. Pg. 51
A polar molecule has an uneven distribution of electrons that gives the molecule + and – charged regions
Practice making metric conversions. *Remember* King Henry Died Monday Drinking Chocolate Milk.
Water is a polar substance/solvent. This means that water will dissolve _______. Pg. 59
Other polar or ionic substances
Substances that do not dissolve in a polar solvent might be considered to be _________. This means that they will dissolve in a __________ solvent. Pg. 59
Substances that do not dissolve in a polar solvent might be considered to be NONPOLAR This means that they will dissolve in a NONPOLAR solvent.
Two examples of polar substances that will dissolve in water are ___________ and _____________. Pg. 59
Rubbing alcohol and sugar
Two examples of non-polar substances are ____________ and gasoline.
Oil, kerosene, diesel
Likes dissolve __________. Pg. 59
Like dissolves like
What is the difference between direct and indirect water use?
Direct is seen water use. Ex: drinking water, bottles water, washing your dishes Indirect is unseen (behind the scenes) water use. Ex: water to grow plants, water to cool machines in the creation of an egg carton
How is the worlds water supply distributed around the planet? Pg. 16