Chemistry #3 physical vs chemical properties – Flashcards
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What are physical properties?
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Properties of matter that does not change the chemical nature. determined without destroying matter observe with our senses.
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What are chemical properties?
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properties of matter that do change the chemical nature. matter will be changed into a new substance after the reaction
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5 SENSES=
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physical properties
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Examples of physical properties...
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luster sour taste melting point/freezing point solubility-WATCHING something dissolve ductility- put into wires malleability magnetism blue color viscosity-thickness electrical conductivity odor hardness density
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examples of chemical properties...
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corrosion reactivity REACTS with acid pH radioactivity flammability REACTS with water combustion- ability for something to burn
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(Physical or Chemical) properties describe matter
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both
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(Physical or Chemical) properties of a substance can be easily observed
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physical
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One can use thier 5 senses to determine the (Physical or Chemical) properties of a substance
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physical
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(Physical or Chemical) properties usually describe how a substance reacts
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chemical
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(Physical or Chemical) properties are not as easy to observe
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chemical
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(Physical or Chemical) properties can be used to identify substances
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both
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(Physical or Chemical) oxygen is odorless and colorless
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physical
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(Physical or Chemical) copper turns green when exposed to the environment
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chemical
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(Physical or Chemical) the piece of metal is magnetic
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physical
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(Physical or Chemical) the density of water is 1.0 gram per cubic centimeter
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physical
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(Physical or Chemical) Diamonds are a very hard substance
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physical
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(Physical or Chemical) the tree is 8 meters high
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physical
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(Physical or Chemical) sodium reacts very easily with other elements
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chemical
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(Physical or Chemical) copper conducts electricity
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physical
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(Physical or Chemical) water is a liquid
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physical
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(Physical or Chemical) The mass of the Nacl sample is 30 grams
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physical
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(Physical or Chemical) gold is nonflammable
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chemical
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(Physical or Chemical) Alka-Seltzer tablets react with water to produce gas
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chemical
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(Physical or Chemical) the color of the ball is red
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physical
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(Physical or Chemical) Iron reacts with water to form rust
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chemical
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(Physical or Chemical) the boiling point of water is 100 c
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physical
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(Physical or Chemical) baking soda reacts with vinegar
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chemical
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(Physical or Chemical) the gas is flammable
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chemical
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(Physical or Chemical) oxygen is a gas
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physical
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(Physical or Chemical) Aragon is not very reactive
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chemical
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(Physical or Chemical) nitrogen is a colorless gas
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physical
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(Physical or Chemical) the silver spoons tarnished and turned dark
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chemical
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(Physical or Chemical) the piece of metal is magnetic
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physical
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(Physical or Chemical) A students shirt suddenly bursts into flames
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chemical
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(Physical or Chemical) silver necklaces tarnish and turn green
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chemical
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True or False: With a physical change, no new substance is formed.
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true
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True or False: With a chemical change, a chemical reaction occurs.
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true
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True or False: With a physical change, energy is either given off or absorbed.
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false
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True or False: A chemical change can be easily reversed.
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false
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True or False: A catalyst speeds up a chemical reaction.
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true
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Indicators of Physical Properties
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texture color change of state shape A new substance is NOT created a change in shape,size, or state.
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Indicators of Chemical Changes
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Change in Color Noticeable Odor (after reaction has begun) Light Change in Temperature Sound formation of bubbles formation of Precipitate (liquids come together and form a solid)
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When does a physical change occur?
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when the size,shape or state of matter changes
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What type of change can be reversed?
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physical change
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What would cause the molecules in matter to change?
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extreme heat
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If a substance changes color, what most likely happened?
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a chemical change has taken place
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Stepping on a bag of potato chips would be what kind of change?
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physical change
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What is a clue that a chemical change has taken place?
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a gas forms when the change takes place
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When autumn leaves change form green to red, orange and yellow, what has occurred?
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a chemical change has occurred
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What type of change has occurred when a nail rusts
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a chemical change
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A physical change means that:
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matter has changed size,shape or form
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A chemical change means that:
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one substance has changed into another
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What kinds of chemical changes happen inside of your body?
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food is broken down by enzymes in your stomach
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What type of change has happened when an apple core has turned brown?
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chemical change
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What type of change is weathering?
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physical change
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How can salt be made?
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in a chemical reaction between sodium and chlorine
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Example of a chemical change that happens over a period of time
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rusting of metal
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What type of change occurs when glass breaks?
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physical change
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Solubility is what kind of change
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physical change
