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;
35 Cards in this Set
- Front
- Back
|
liquid |
In the _______ state of matter the particles are loosely connected and move past one another. |
|
|
solid |
In the ______ state of matter the particles are packed tightly together and stay in fixed positions. |
|
|
gas |
In the ________ state of matter the particles move independent, collide frequently and spread apart. |
|
|
crystalline |
A ________ solid if formed when molecules or atoms form repeated patterns. |
|
|
faster |
When a substance goes from being a solid liquid the molecules move ________.` |
|
|
states of matter |
Liquid water, ice, and water vapor are the same compound in different __________. |
|
|
electron |
The _______ is the subatomic particle that travels around the center of the atom. |
|
|
proton and neutron |
the _______ and the _______ are the subatomic particles found within the center of the atom. |
|
|
nucleus |
the center of the atom |
|
|
compound |
When two different atoms are combined a new ______ is formed. |
|
|
aluminum and sulfate |
Name the compounds AL2(SO4)2+H2 |
|
|
phosphate |
Mg + H3(PO4) yields Mg3(PO4) + H2 identify the polyatomic ions |
|
|
magnesium hydrogen |
Mg + H3(PO4) yields Mg3(PO4) + H2 Identify the atoms that are not part of a polyatomic ions. |
|
|
different |
In a chemical reaction, the reactants make new products with ________ properties than the reactants. |
|
|
physical |
An unknown substance is heated and is changed from a liquid into a gas. This is an example of a _______ change. |
|
|
chemical |
The only sure evidence for a ______ reaction is the formation of new materials with different properties. |
|
|
equal to |
In chemical reactions, the principle of conversation of matter (mass) means the total mass of the reactants is __________ the total mass of the products. |
|
|
cold |
An endothermic chemical reaction will feel ______ because it absorbs heat. |
|
|
warm |
An exothermic chemical reaction will feel ______ because it releases heat. |
|
|
acid |
Any substance that forms hydrogen ions (H+) in water is an _____. |
|
|
base |
Any substance that forms hydroxide polyatomic ions (OH-) in water is a _______. |
|
|
acid |
If a solution has a pH of 5, the solution is an ______. |
|
|
base |
If a solution has a pH of 8, the solution is a ______. |
|
|
neutral |
A substance with a pH of 7, is _________. |
|
|
acid |
If blue litmus paper turns red, the solution is an _______. |
|
|
base |
If red litmus paper turns blue, the solution is an _______. |
|
|
neutral or water |
If red and blue litmus paper are put in a liquid and neither paper shows a color change the liquid is probably _________. |
|
|
carbon |
The element ______ plays a central role in the chemistry of living things, and combines in many ways itself and other elements. |
|
|
4 |
Carbon forms ____ (how many?) bonds. |
|
|
polymer |
DNA is a very large _________. |
|
|
Salt Vitamins Water and Minerals |
Living organisms need these small molecules. |
|
|
Carbohydrates Lipids Nucleic acids and Proteins |
ist the 4 classes of polymers that are commonly found in living organisms. |
|
|
phosphorus oxygen nitrogen hydrogen carbon sulfur |
List the 6 elements that are commonly found in the molecules that make up living organisms. |
|
|
isotopes |
________ are atoms of the same element with same # of protons but a different # of neutrons. |
|
|
18 21 22 |
Ar-39 and Ar-40 are isotopes of Argon. Both have _____ protons but Ar-39 has ____ neutrons and Ar-40 has ____ neutrons. |
