Elements Flashcards
A pure substance that cannot be broken down into simpler substances is called what
Element
what process is not a physical or chemical change
Weighing
What is a substance with only one type of particle called
Pure substance
What does not affect the characteristic properties of an element
The amount of element
Why does a helium filled balloon float up when you let go
Helium is less dense than air
What is a characteristic property of elements
Hardness
What can be identified by its unique properties
Element
What combines with oxygen to form rust
Iron
What has a melting point of 1495°C
Cobalt
All _______ are either metals, metalloids, or nonmetals
Elements
Elements that are shiny and conduct heat and electric current are
Metals
Elements that are poor conductors of heat are
Nonmetallic
Elements with properties of metals and nonmetals are
Metalloids
Elements that are malleable
Metals
Type of metalloid
Silicon
Another name for metalloid
Semi conductor
Elements that are dull
Nonmetals
Iodine, sulfur, neon
Nonmetals
Lead, copper, tin
Metals
Silicon, boron, antimony
Metalloids
Which is a compound
Salt
What kind of substances composed of two or more elements that are chemically combined
Compound
How do the properties of a compound compare with the properties of the elements that form it
Always different
How do elements join to form compounds
In a specific mass ratio
Is this true
Each compound has its own physical properties
Yes
Why are we able to eat sodium and chloride in a compound
The compound is harmless
The compound that gives some drinks fizz called
Carbonic acid
When you open a Soft drink carbonic acid breaks down into ________ and water
Carbon dioxide
The only way to break down compounds is through a
Chemical change
Which of the following compounds is broken down to make aluminum
Aluminum oxide
What can form compounds from nitrogen in the air
Bacteria
What type of compound do plants and animals use to make proteins
Nitrogen compounds
What do plants use during photosynthesis to make carbohydrates
Carbon dioxide
A pizza is a
Mixture
A combination of two or more substances that are not chemically combined is a
Mixture
When 2 or more materials combine chemically they form a
Compound
How can you tell that the pizza is a mixture
You can separate the toppings
Mixtures are separated through _______ changes
Physical
Crude oil is separated through
Distillation
A mixture of aluminum and iron separated through
A magnet
Parts of blood are separated through
Centrifuge
Sulfur and salt are separated through
Filter
Granite can be pink or black depending on the ______of feldspar, Mika, and quarts
Ratio
What is not true about solutions
They appear to be more than one substance
The process in which particles of substances separate and spread evenly through mixture is known as
Dissolving
In a solution the _______is the substance that is dissolved in the ______ is the substance in which it is dissolved
Solute, solvent
Salt is _______ in water because it dissolves in water
Solute
When 2 gasses or two liquids form a solution, the substance that is present in the largest amount is the
Solvent
A solid solution of metals or nonmetals dissolved in metals is an
Alloy
What can particles in solution not do because they’re so small
They cannot settle out, they cannot scatter light, and they cannot be removed by filtering
A measure of the amount of solute dissolved in a solvent is called
Concentration
What is the difference between a dilute solution and a concentrated solution
Dilute less concentrated solute
concentrated more concentrated solute
The ability of a solute to dissolve in a solvent at a certain temperature and pressure is called
Solubility
In a mixture the _________of the substances doesn’t change
Identity
Mixtures are separated through _________changes
Physical
Solubility of gases in liquids often _______ as temperatures rise
Decreases
Solubility of solids and liquids often ______ as temperatures rise
Increases
Q:The particles in both solution and a collide
A:D. Can pass through a finer filter
Q:A substance that dissolves in a solvent
A:Solute
Q:how could a sugar cube be dissolved more quickly?
A:Cool the water
Q:which of the following is not a reason that compounds are considered pure substances?
A:they can be separated by physical methods
Q: Elements join in a specific mass__________to form a compound
A:Ratio
Q:when element form mixture the keep their _____ ______
A:original properties
Q:what is a solid solution of a metal or nonmetal dissolved in
A: alloy
Q:what is a solid solution of a metal or nonmetal dissolved inanother substance
A:alloy
Q:a collide has the properties of a solution and ___________
A: suspensions
Q:particle of two or more substances distributed evenly among each other form a(n)_________
A:solution
Q:ability of ones substance to dissolve in another at a given temperature and pressure
A:solubility
Q:compound used by plants during photosynthesis
A:Carbon dioxide
Q:bacteria make compounds from _________ in the air.
A:nitrogen
Q:the flammability of a substance
A: A. Chemical property
Q:process that separates mixtures based on the boiling point of the components
A:distillation
Q:compounds also known as table salt
A:sodium chloride
Q:a mixture of liquids can be separated by __________
A:distillation
Q:a steel crowbar is an example of an ____________.
A:alloy
