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Chemistry
Chapter 1
Question | Answer |
---|---|
The basic particle of any element | adam |
the force of attraction between two atoms | chemical bond |
a group of 2 or more atoms held together by chemical bonds | molecule |
a substance that cannot be broken down into any other substance | element |
shows the elements and ratio of atoms in a compound | chemical formula |
a substance made of two or more elements chemically combined in a set ratio | compound |
2 or more substances together in the same place but not chemically combined | mixture |
Anything that has mass and volume | matter |
2 main categories of matter | sustance and mixture |
all matter have both these types of properties that help describe how it looks and acts | chemical and physical |
pure forms of matter can be subdivided into 2 groups | elements and compounds |
What represents forms of matter with only 1 kind of atom | symbol |
what represents the forms of matter with more then one kind of atom | molecule |
What type of matter cannot be seperated with physical means | pure forms of matter |
Matter that is physically combined and can be seperated into two types | hetergenous and homogenous |
4 types of separating processes | filtration, attraction, distillation and evaporation |
the study of matter and how ti changes | Chemistry |
A balloon filled with air does not rise as high as a balloon filled with helium. What does this tell you about density of helium? | Helium is less dense then air |
The amount of matter in an object is a measure of its | mass |
the formula for calculating density is | mass/volume |
What statement about mass of an object is correct | mass remains constant |
The SI unit of mass is | Cubic Meter3 |
One liter is equal to | 1000 millilters |
An objects weight is less on the moon then on the earth. On the moon the objects mass | stays the same |
Four measurable properties of matter are | mass, weight, volume and density |
The SI unit of volume is | cubic meter (m3) |
a molecule is the smallest part of | a substance |
compounds are formed as a result of | chemical combination |
a mixture of iron and sulfur can be seperated by | magnetic attraction |
The ratio of hydrogen atoms to sulfur atoms in sulfuric acid H2SO4 | 2 to 1 |
the simplest type of subtance is | compound |
the SI unit of mass | Kilogram (kg) |
examples of compounds | water, ammonia, carbon dioxide |
mixture that you can see the different parts and can be easily seperated out | heterogeneous |
Example of hetergenous mixture | salad- tomatoe, lettuce, onions |
A mixture where the sustances are so evenly mixed that you can't see the different parts | Homogenous mixture |
exmaple of homogenous mixture | air |
the physcial property that makes metal pots good for cooking | heat conductvity |
which of the following is true about matter | it has mass and takes up space |
which is not true about a pool of water and a piece of ice | they have different chemical properties |
characteristcs used to descibe matter are called | physical properties |
3 states of matter | solid, liquid and gas |
the metal tungsten used in incandescent light bulbs because of its porperty of | high melting point |
the ability of iron to rust is a | chemical property |
a single kind of matter that has a specific composition | substance |
Another term for the ability to burn | flammibility |
texture is a | physcial property |
ability to react with othe rsubstances | chemical property |
ability to conduct heat | physcial property |
hardness is a | physical property |
lack of ability to rust is a | chemical property |
what is an example of a substance | table salt |
which property of a substance can only be observed if the substance changes into a different substance | chemical property |
The boiling point of a substance is what type of property | physcial property |
what type of change occurs when energy is added or removed | phsical and chemical change |
what type of change occurs if a new substance is produced | chemical change |
A substance changes form, but it remians the same substance is what type of change | physical |
Freezing water is what type of change | physical |
The energy stored in the chemical bonds between atoms | chemical energy |
a change in which enery is absorbed | endothermic change |
a measrue of energy of motion of the particles of matter | temperature |
the total energy of all the particles in an object | thermal energy |
the fact tha tmatter is netiher created nor destoyed in any physical or chemical change | law of conservation of mass |
a change in which energy is released | exothermic change |
a change in matter that produces one or more new substances | chemical change |
alters the form or appearance of matter but does not turn any substance in the matter into another substance | physical change |
what are examples of physcial changes | glass breaking, ice melting, sugar dissolving |
what is not a example of a physcial change | iron rusting |
the energy stored in bonds between atoms is | chemical energy |
Matter can be changed in 2 ways | chemically and physically |
Examples of chemical changes | combustion, tarnishing, oxidation |
What is the ability to do work or cause change | energy |
Every chemical and physical change in matter includes a change in | energy |
Like matter, energy is conserved in what type of change | chemical change |
measure of how hot or cold something is | temperature |
what is related to teh energy of motion of the particles of matter | temperature |
what is the total energy of all the particles in an object | thermal energy |
direction thermal energy flows from | warmer matter to cooler matter |
the measure of the force of gravity on an object | weight |
what varies with location within the solar system | weight |
the amount of matter in an object | mass |
What is constant and does not change with location | mass |
the system used to measure the properties of matter | international system of units or SI |
How many grams in a kilogram | 1000 grams |
the amount of space matter occupies | volume |
how many milliliters in a liter | 1000 millilters |
Volume calculation | length X width X height |
the measure of the mass of a material in a given volume | density |
density measurement | g/cm3 or g/ml |
density calcuation | mass / volume |
Density is what type of property | physical property |
what is a single kind of matter that is pure and has a specific set of properties | substance |
a characteristic that belongs to a person or thing | property |
tells you the relationship between 2 or more things | ratio |
Examples of matter | air, plastic, metal, wood, glass, paper |
the basic particle from which all elements are made | atom |
when atoms combine they form what type of bond | chemical bond |
the force of attraction between two atoms | chemical bond |
a group of two or more atoms held together with chemical bonds | molecule |
A substance made of two or more elements that are chemically combined in a set ratio | compound |
what shows the elements in the compound and the ratio of atoms | chemical formula |
chemical formula for carbon dioxide | CO2 |
what holds the hydrogen and oxygen atoms together in a water molecule | chemical bonds |
2 or more substances that are together in the same place, but their atoms are not chemically bond | mixture |
disolving sugar in water is what type of change | physical change |
What type of change is filtration and distillation | physical change |
when matter is not created or destroyed in any chemical or physical change is called | the law of conservation of mass |
the energy stored in the chemical bonds between atoms is a form of what type of energy | chemical |
What type of energy do bears get from its food | chemical energy |
example of chemical property | flammability |
what is a substance | table salt because it is a pure matter |
which is an element | oxygen |
how can you prove dissolving table salt in water is a physical change | you can evporate the water and only the salt remains |
the ability to dissolve in water and conduct electric current are examples of | physical properties |
which 2 pieces of equipment what be most useful for measuring mass and volume | balance and metric ruler |