matter

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Network covalent bonding

Properties of water

Ionic bond

Solid

water

Glass

molecule

Properties of Compounds 1 Covalent distinct molecules held together by intermolecular forces relatively weak attractions, therefore low melting points not dense or hard poor heat and electricity conductors 2 Network Covalent exceptions continuous 3-D pattern?crystal Examples: diamonds, silicates 3 Network Covalent hard and brittle high melting points glassy luster 4 Ionic strong bonds, therefore high melting and boiling points hard solids can be split water-soluble good e? conductor in H2O, not as a solid 5 Ionic substances have low melting points. Ionic substances have low boiling points. Ionic substances don?t dissolve in water. Ionic substances are brittle. Question Because ionic bonds are strong, 6 Metallic carry electrons have luster (shine) malleable ductile 7 8

Bob Jones PPT Notes -- Chapter 5c

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Metal

Elemental & Families Properties Their 1 Hydrogen: A Family of Its Own Why is it by itself? Can lose or gain one electron Discovered by Cavendish Physical properties (PP) Chemical properties (CP) Uses Hydrogen: A Family of Its Own Physical properties (PP) colorless, odorless, tasteless gas Chemical properties (CP) active, like a Group 1A metal or a Group 7A nonmetal diatomic can react with metals to form metallic hydrides Hydrogen: A Family of Its Own Uses ammonia fuel cells ?rocket? fuel Hydrogen: A Family of Its Own Supposed to have initially formed H & He Big Bang 6 Group 1: The Alkali Metal Family Physical properties light, soft, shiny, conduct electricity well 7 Chemical properties most reactive metals eager to lose lone outer e? never occur naturally

Bob Jones PPT Notes -- Chapter 2c

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Physics

Chemical engineering

Condensed matter physics

Gas

energy

Plasma

Phase

Environment

Section 2C States of Matter Kinetic-Molecular Theory All particles are in motion. Add energy = increase motion. Motion tries to tear apart matter. Attractive forces hold matter together. Attractive ? electrical, between particles Disruptive ? caused by kinetic energy (motion) Balance between these forces determines state. Kinetic-Molecular Theory Two Forces Solid Low energy Touching Locked in place Only vibrate (The inter-molecular forces are higher in energy than the kinetic energy.) 4 p. 41 of Chem. textbook Liquid More kinetic energy Still touching Not locked in place Can roll around (The intermolecular forces are almost equal to the kinetic energy.) 5 p. 41 of Chem. textbook Atoms are touching. Attractions are greater than repulsions. Atoms roll around. Atoms are small.

Bob Jones PPT Notes -- Chapter 2a

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Physics

Science

The Classification of Matter Matter Matter is described as ?anything that takes up space and has mass.? Matter Matter was created ex nihilo, which means ?from nothing.? Science Guess Scientific method Faith Observation Question How can we know where matter comes from? 4 Atom - Clipart.com Item #20307567 Organization of Matter Pure substances Mixtures Is a substancepure or a mixture? Determined by: Physical properties Chemical properties Physical Properties Physical properties can be measured without changing the material into another substance. They describe how a substance is by itself. The following terms are examples of physical properties: density density describes how the particles are packed into a material malleability malleability

Cycles Notes

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Trini Soza Mr. Miguelez APES, 5 10 December 2013 Cycles Questions Water It basically is what keeps an organism alive. The Hydrologic Cycle keeps the water movement going on, above and bellow the surface. There would be more groundwater since the tree roots are not there to absorb the rainfall, as well with a decrease in water evaporation. Logging takes a hit at the Hydrologic Cycle since trees play a crucial role in it. Not only does the fact that we cut down trees affect the cycle, but also one of the biggest effects we have is contamination. The contamination of oceans, rivers, lakes are damaging the quality of the water in the cycle. Carbon Dioxide - Respiration from animals - Organisms - Dissolved CO2 from ocean - Combustion of fossil fuels - Erosion - Volcanic reactions

Chemistry The central science Chapter

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Curium

Periodic Table Period 1 I A 18 VIII A 1 1s 1 ?1 atomic # ? 29 +2,1 ? ions commonly formed 2 0 H 2 II A atomic symbol ? Cu 13 III A 14 IV A 15 V A 16 VI A 17 VII A He hydrogen English element name ? copper helium 1.008 63.55 ? atomic mass (rounded) 4.003 2 2s 3 +1 4 +2 2p 5 +3 6 ?4 7 ?3 8 ?2 9 ?1 10 0 Li Be B C N O F Ne

APES MIDTERM 2007

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Millennium Development Goals

Environment

Oxides

Ozone

NOx

APES

environmental science

Practice Test APES Spring Midterm 2007 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Which of the following does not apply to sea otters? a. They have blubber to keep them warm. b. They can eat 25 % of their weight per day in sea urchins and other benthic organisms. c. They use tools. d. They have the thickest fur of any mammal. ____ 2. The most common pattern of population dispersion found in nature is a. random. b. uniform. c. clumped. d. dispersed. ____ 3. Biotic potential is determined by a. reproductive age span. b. the minimum viable population. c. how many offspring die before reproducing. d. irruptive populations.

APES MIDTERM 2007

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Millennium Development Goals

Environment

Oxides

Ozone

NOx

midterm

APES

environmental science

Practice Test APES Spring Midterm 2007 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Which of the following does not apply to sea otters? a. They have blubber to keep them warm. b. They can eat 25 % of their weight per day in sea urchins and other benthic organisms. c. They use tools. d. They have the thickest fur of any mammal. ____ 2. The most common pattern of population dispersion found in nature is a. random. b. uniform. c. clumped. d. dispersed. ____ 3. Biotic potential is determined by a. reproductive age span. b. the minimum viable population. c. how many offspring die before reproducing. d. irruptive populations.

Chemistry SL design IA

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Food and drink

Iodine

Oxidizing agents

Halogens

Starch

Beaker

Thermometer

Technology

Chemistry SL design IA

What Effect does Temperature on the Rate of Reaction? Introduction Temperature is nothing more than the average kinetic energy of a mass of atoms. This being said, the less kinetic energy present, the fewer collisions between the conglomeration of atoms, and thus the slower a reaction will progress (chemguide.co.uk). This idea is powered by the collision theory, allowing us to accurately hypothe- size what will happen based on the temperature of a solution. As we approach absolute zero (0o K), the rate of reaction asymptotically approaches zero, never reaching it ,since we can never thoeretically reach absolute zero, but getting infintesimally closer by a mesurable degree.

Author reliablility handout

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