Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
43 Cards in this Set
- Front
- Back
|
What is an element?
|
An element is a purse substance that cannot be separated into simpler subtances by physical or chemical means.
|
|
|
What is a pure substance?
|
A substance in which there is only one type of particle.
|
|
|
Cobalt
|
Conducts electric current and thermal energy. Unreactive with oxygen in the air.
|
|
|
Iron
|
Conducts electric current and thermal enery. Combines slowly with oxygen in the air to form rust.
|
|
|
Nickel
|
Conducts electric current and thermal energy. Unreactive with oxygen in the air.
|
|
|
Elements are divided into what three categories?
|
Metals, nonmetals and metalloids.
|
|
|
Metals
|
Elements that are shiny and are good conductors of thermal energy and electric current.
|
|
|
Nonmetals
|
Elements that are dull (not shiny) and that are poor conductors of thermal energy and electric current.
|
|
|
Metalloids
|
Also called semiconductors, they are elements that have properties of both metals and nonmetals. Some are shiny, some are dull.
|
|
|
Compound
|
A purse substance composed of two or more elements that are chemically combined.
|
|
|
Table Salt
|
sodium and chlorine
|
|
|
Water
|
Hydrogen and oxygen
|
|
|
Sugar
|
Carbon, hydrogen and oxygen
|
|
|
Carbon dioxide
|
carbon and oxygen
|
|
|
Baking Soda
|
sodium, hydrogen, carbon and oxygen
|
|
|
Sodium
|
A soft, silvery white metal that reacts violenty with water.
|
|
|
Chlorine
|
Poisonous, greenish yellow gas.
|
|
|
Sodium Chloride
|
Table salt, is a white solid that dissolves easily in water and is safe to eat.
|
|
|
Mixture
|
A combination of two or more substances that are not chemically combined.
|
|
|
Distillation
|
Process that seperates a mixture based on the boiling points of the components.
|
|
|
Magnet
|
Can be used to separate a mixture of the elements iron and aluminum.
|
|
|
Contrifuge
|
A machine that separates the components of blood.
|
|
|
Mixtures vs. Compounds
Components are elements, compounds or both. |
Mixtures
|
|
|
Mixtures vs. Compounds
Components keep their original properties? |
Mixtures
|
|
|
Mixtures vs. Compounds
Separated by physical means |
Mixtures
|
|
|
Mixtures vs. Compounds
Formed using any ratio of components. |
Mixtures
|
|
|
Mixtures vs. Compounds
Components are elements. |
Compounds.
|
|
|
Mixtures vs. Compounds
Components lose their original properties. |
Compounds
|
|
|
Mixtures vs. Compounds
|
Separated by chemical means.
|
|
|
Mixtures vs. Compounds
|
Formed using a set mass ratio of components.
|
|
|
Solution
|
A mixture that apperas to be a single substance but is composed of particles of two or more substances that are distributed evently amongst each other.
|
|
|
Solute
|
The substance that is dissolved.
|
|
|
Solvent
|
The substance in which the solute is dissolved.
|
|
|
Different States in Solutions
Gas in gas |
Dry air (oxygen in nitrogen)
|
|
|
Different States in Solutions
Gas in liquid |
Soft drinks (carbon dioxide in water)
|
|
|
Different States in Solutions
Liquid in liquid |
Antifreeze (alcohol in water)
|
|
|
Different States in Solutions
Solid in liquid |
Salt water (salt in water)
|
|
|
Different States in Solutions
Solid in solid |
Brass (zinc in copper)
|
|
|
Concentration
|
A measure of the amount of solute dissolved in a solvent.
|
|
|
Solubility
|
The amount of solute need to make a saturated solution using a given amount of solvent at a certain temperature.
|
|
|
Three methods used to make a solute dissolve faster.
|
Mixing, heating and crushing
|
|
|
Suspension
|
A mixture in which particles of a material are dispersed throughout a liquid or gas but are large enough that they settle out.
|
|
|
Colloid
|
A mixture in which the particles are dispersed throughout but are not heavy enough to settle out.
|
