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;
27 Cards in this Set
- Front
- Back
|
Atoms |
• Smallest particle of an element that cannot be broke up chemically. • consist of protons, neutrons, and electrons
|
|
|
Molecules |
Group of 2 or more atoms held together by a chemical bond |
|
|
Matter |
• Anything that occupies space and has mass • Exist as solid, liquid, and gas |
|
|
Solid |
Definite fixed shape and volume |
|
|
Liquid |
Takes shape of container Fixed volume Form horizontal surface |
|
|
Gas |
Expands to fill container No definite shape or volume |
|
|
Matter consist of these two |
Pure substance Mixture |
|
|
Pure substance and consist of |
Has constant properties and composition Cannot be physically separated Element and compound |
|
|
Mixture and what it consist |
No constant properties and composition Can be physically separated homogeneous and heterogeneous |
|
|
Element |
Cannot be simplified chemically Fundamental substance Cannot be separated into simpler substances by chemical methods |
|
|
Compound |
Can be simplified chemically Substance composed of two or more elements in fixed proportions Can be separated into simpler substances and elements only by memorial methods |
|
|
Physical change properties |
characteristic of substance: color, shape, odor, luster, size, melting point, or density |
|
|
Changes of Physical change |
Change in physical property that retains the identity of the substance: a change of state, a change in size, or a change in shape |
|
|
Chemical change properties |
A characteristic that indicated the ability of a substance to form another substance: paper can burn, iron can rust, silver can tarnish |
|
|
Changes in chemical change |
A change in which the original substance is converted to one or more new substances: paper burns, iron rusts, silver tarnishes. |
|
|
Boiling points for k, C and F |
Kelvin 373 Celsius 100 Fahrenheit 212 |
|
|
Freezing point for k, C, F |
K 273 0 C 32 F |
|
|
SI unit |
Km, m, cm, g, L, Kelvin |
|
|
English unit |
Mile, foot, inch, pound, ounce, gallon, Celsius |
|
|
SI unit |
Kg, m, s(sec), K, mol |
|
|
Density formula |
Mass over volume Density times volume for mass Mass over density for volume |
|
|
Accuracy |
Getting right in the middle If volume is 60 ml and instead got 70ml then is not accurate value |
|
|
Precision |
How repeatable a measurement can be Same weight of 3.2kg 3 times Precise measurement |
|
|
Multiplying and dividing |
Least amount of sig figs |
|
|
Sig figs |
Deference in number that help determine accuracy |
|
|
Average deviation |
Calculate like mean |
|
|
Deviation is |
Measure of precision |
