chap1- matter
What is triatomic?
3 atoms
What is a chemical property?
A characteristic of a substance that describes its ability to change into different substances
What is a element?
A substance that cannot be broken down into simpler substances
Element: Al
Aluminum
Element: Xe
Xenon
Physical or chemical property? -cup of household bleach changes the color of your tshirt from purple to pink
chemical property
Physical or chemical property? -gold metal does not react with nitric acid
chemical property
Physical or chemical process? -bruning wood stick
chimical process
Physical or chemical process? -rusting of iron bridge
chimical process
Element: H
hydrogen (hydride)
True or False? -pure substances are seldom encountered in "everyday" world
true
What is a heterogeneous mixture?
visibly different phases
Element: Zn
Zinc
What is physical change?
change in physical change
Element: Li
lithium
What is a atom?
smallest basic unit of matter
What are the 3 physical states?
solid, liquid, gas
True or False? -both elements and compounds are pure substances
true
What is a chemical symbol?
A one or two letter representation of an element
what is matter?
Anything that has mass and takes up space
Element: Ba
Barium
Element: Cd
Cadmium
Element: Ca
Calcium
What is chemical change?
Changing of one substance into a new substance that has different properties
Element: Ga
Gallium
Element: I
Iodine (iodide)
Element: Kr
Krypton
Element: Pb
Lead
Element: Mg
Magnesium
Element: Mn
Manganese
Element: Hg
Mercury
Element: P
Phosphorus (phosphide)
Physical or chemical process? -melting ice
Physical process
Physical or chemical property? -mercury is a liquid at room temp
Physical property
Element: K
Potassium
Element: Na
Sodium
Element: Sr
Strontium
Element: S
Sulfur (sulfide)
What is a homoatomic molecule?
all atoms present are the same kind
Element: B
boron
What physical characteristic distinguishes gases from solids?
both volume and shape
Element: C
carbon (carbide)
Physical change, Physical property, chemical change,or chemical property? -process of burning piece of newspaper
chemical change
Physical change, Physical property, chemical change,or chemical property? -fact that hydrogen gas reacts with flourine gas
chemical property
Heterogeneous mixture, homogeneous mixture, compound, or element? -colorless gas that cannot be seperated into simpiler substances using physical means and that reacts with metal magnesium to produce both a magnesium oxygen compound and a magnesium nitrogen compound
compound
What is the physical state of a solid?
definite shape and definite volume
Substance A-D either element, compound, or not possible? -Substance A- canot be broken down to simplier substances by chemical means
element
What are pure substances?
elements and compounds- single matter that cannot be seperated
True or False? -compound results from physicalcombination of 2+ elements
false
True or False? -compounds, but not elements, can have variable composition
false
True or False? -order of matter to be heterogeneous, at least 2 compounds must be present
false
True or False? -substances maintain their identity in a heterogeneous mixture but not in homogeneous mixture
false
Element: Au
gold
What is a molecule?
group of 2+ atoms
Element: He
helium
Heterogeneous mixture, homogeneous mixture, compound, or element? -nonuniform, white crystalline substance, part of which dissolves in alcohol and another part that does not dissolve in alcohol
heterogeneous mixture
Heterogeneous mixture, homogeneous mixture, compound, or element? -blue-colored, single phase liquid when boiled away leaves behind a solid residue
homogeneous mixture
What is the physical state of a liquid?
indefinite shape and definite volume
Element: Fe
iron
Element: N
nitrogen (nitride)
What physical characteristic distinguishes the same for gases and solid states?
no common physical characteristics
Substance A-D either element, compound, or not possible? -Substance B- cannot be broken down simplier by physical means
not possible
Substance A-D either element, compound, or not possible? -Substance C-readily dissolves in water
not possible
Substance A-D either element, compound, or not possible? -Substance D- readily reacts with the element chlorine
not possible
What physical characteristic does copper wire have?
not take shape of container, definite volume
What is a homogenous mixture?
only one visibly distinct phase
Element: O
oxygen (oxide)
what are the 2 general types of property?
physical and chemical
Physical change, Physical property, chemical change,or chemical property? -process of sublimation of iodine
physical change
Physical or chemical change? -butter melts when put in sun
physical change
What physical characteristic does hydrogen gas have?
takes shape of container, definite volume
What is chemistry?
the study of matter and the changes it undergoes
How many elements have been discovered?
118
What is diatomic?
2 atoms
What is a compound?
2 or more elements chemically combined
What is a mixture?
A combination of two or more substances that are their own substances
Element: Ar
Argon
Element: Br
Bromine (bromide)
Element: Co
Cobalt
Element: Cu
Copper
Element: Pt
Platinum
What physical characteristic distinguishes solids from liquids?
Shape
Element: Si
Silicon
Element: Ag
Silver
Element: Sn
Tin
Element: F
flourine (flouride)
Heterogeneous mixture, homogeneous mixture, compound, or element? -cloudy liquid that seperates into 2 layers upon standing overnight
heterogeneous mixture
What is the best description of chocolate chip cookie?
heterogeneous mixture
What are the 2 types of mixtures?
homogeneous and heterogeneous
What physical characteristic does tap water have?
takes shape of container, definite volune
What is mass?
the amount of matter in an object
True or False? -Pure substances cannot have varibile composition
true
What is a heteratomic molecule?
where 2+ atoms are present
What is tetratomic?
4 atoms
What is pentatomic?
5 atoms
what is the physical state of a gas?
Indefinite shape and indefinite volume
Element: Ne
Neon
Element: Ti
Titanium
What is a physical property?
a characteristic that can be observed or measured without changing the identity of the substance
Element Be
beryllium
Physical or chemical change? -plants use carbon divoxide from air to make sugar
chemical change
Physical change, Physical property, chemical change,or chemical property? -fact that metallic copper reacts with chorine gas
chemical property
How are the number of elements shown?
subscript
Element: Cl
Chlorine (chloride)
Element: Cr
Chromium
Element: Ni
Nickel
True or False? -All heterogeneous mixtures must contain 3+ substances
False