click below
click below
Normal Size Small Size show me how
Physical Science
2013 End Final
Question | Answer |
---|---|
An orderly, systematic approach to problem solving | Scientific method |
A proposed solution to a scientific problem is called a | Hypothesis |
In an experiment, one factor being tested is the | Variable |
The basic unit of length in the metric system | Meter |
A cubic centimeter is equal in volume to a | Millimeter |
The basic unit of mass in the metric system is | Gram |
The amount of matter in an object is called its | Mass |
To measure the mass of a solid, you should use a | Balance |
An air piston is graduated in | Cubic centimeters |
What are the general properties of matter? | Weight, volume, mass, density |
The density of an object is equal to | Mass/volume |
Matter that has a definite shape and definite volume is a | Solid |
The phase of matter in which the particles move the fastest and farthest is | Gas |
The phase change from a gas to a liquid is called | Condensation |
According to makeup, matter exists as | Elements, compounds, molecules, solutions |
Putting an acid on something tests its | Chemical properties |
If something happens after putting an acid on something, that is a | Chemical change/reaction |
The different phases of matter ____ energy as they go up | Gain |
The different phases of matter ____ energy as they go down | Lose |
Qualitative is an observation using | The five senses |
Quantitative is an observation using | Amounts/numbers |
Protons have a/an __________ charge | Positive |
Electrons have a/an __________ charge | Negative |
Neutrons have a/an __________ charge | Neutral |
Protons are located in the __________ | Nucleus |
Electrons are located in the __________ | Outside of the nucleus |
Neutrons are located in the __________ | Nucleus |
Protons have a mass of | 1 AMU |
Electrons have a mass of | 0 AMU |
Neutrons have a mass of | 1 AMU |
Matter than consists of 2 or more substances mixed but not chemically combined is a | Mixture |
The basic building block of matter is the | Atom |
The simplest type of a pure substance is a/an | Element |
Rutherford's atomic model pictures a positively charged center called a/an | Nucleus |
Particles smaller than the atom are called | Subatomic particles |
The nucleus of an atom contains | Protons and neutrons |
The number of protons in an atom are the same as it's ___________ | Atomic number |
Electrons in the outermost energy level cannot exceed | 8 |
The transferring of electrons is what type of bond? | Ionic |
The sharing of electrons is what type of bond? | Covalent |
A bond involving a compound with three or more elements is a | Polyatomic bond |
Metals bonding with a metal is a | Metallic bond |
Ionic bonds involve the transferring between | A metal and non-metal |
Covalent bonds involve the sharing between | Nonmetals and nonmetals |
Solid directly to a gas is | Sublimation |
Putting ionic or polyatomic bonds in water will cause the water to | Conduct/create energy |
Groups __ and __ are the most reactive on the periodic table | 1 and 17 |
The least reactive group on the table are the | Noble gases, group 18 |
_____ is solid, _____ are gas | Black; red |
Majority of the elements on the periodic table are | Metals |
_____ elements are manmade | White |
There are __ groups on the periodic table | 18 |
There are __ columns on the periodic table | 8 |
There are __ periods on the periodic table | 7 |
Alkaline metals are in the _ orbital | s |
Transition metals are in the _ orbital | d |
Gases are in the _ orbital | p |
Rare earth metals are in the _ orbital | f |
Electrons in the outermost energy level are called | Valence electrons |
The ability to undergo chemical reactions is determined by its | Outermost electrons |
In a balance chemical equation | Atoms are balanced |
Two or more simple substances combine to form a single new substance in a | Synthesis |
A reaction in which energy is absorbed is called | Endothermic |
A reaction in which energy is released is called | Exothermic |
True or false: the valence electrons determine the net charge | False |
Valence electrons determind how an atom/element | Bonds |
True or false: valence electrons identify an element | False |
__________force holds together a compound | Electrostatic |
Hydrogen online forms __________ bonds | Covalent |
Roman numerals are only used when | The first compound is metal |
Ductile is when | A metal can be made into a thin wire |
Malleable is when | A metal can be pounded into a thin sheet |
Atoms are __________ in a reaction | Rearranged |
Before a new bond can occur the only bonds must be | Broken |
On a graph, the products of an exothermic reaction are | Lower |
On a graph, the products of an endothermic reaction are | Higher |
You can tell a chemical change has taken place when | Gas, unpredictable color change, temperature change, or precipitation occur |
The rate of reaction is influenced by | Heat, surface area, pressure, or catalyst/inhibitor |
The coefficient also tells you the number of | Moles |
In balancing, the _____ must be equal | Atoms |
H2 + Blue = | Blue flame, ignited gas |
H2 + Red = | Red |
Air + Blue = | Blue flame that stays burning |
Air + Red = | Red |
CO2 | Puts out a flame |
CO2 + Red | Yellow |
CO2 + Blue | Yellow |
All acids start with the letter | H |
All bases end in | OH |
If an element does start with H or end in OH, it is | Neutral |
A ph less than 7 is | Acidic |
A ph at 7 is | Nuetral |
A ph greater than 7 is | Basic |
Shell + HCl creates | CO2 |
Anti-acids are | Bases |
You should always balance an equation before you calculate the | Moles |
When balancing an equation, if all have a coefficient check to see if you can | Simplify it |