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;
17 Cards in this Set
- Front
- Back
|
Matter |
Anything that has mass and takes up space |
|
|
Weight |
A measure of how strongly gravity pulls on an object |
|
|
Mass |
A measure of how much matter exists in an object |
|
|
Density |
A measure of how tightly packed the matter in a substance is =mass/volume |
|
|
Pure Substance |
A substance whose properties are the same throughout |
|
|
Mixture |
A combination of two or more pure substances |
|
|
Homogeneous mixture |
A mixture whose composition is the same throughout the sample |
|
|
Heterogeneous mixture |
A mixture whose composition is different in different parts of the sample |
|
|
Law of Mass Conservation |
In any chemical or physical process, the total mass of everything involved must remain the same |
|
|
Element |
A substance that cannot be chemically broken down into simpler substances |
|
|
Compound |
A pure substance that is composed of two or more elements |
|
|
Law of Definite Proportions |
A given compound will always have the same proportion of elements by mass |
|
|
Molecule |
A combination of two or more atoms joined together |
|
|
Law of Multiple Proportions |
When two elements combine to form different compounds, a fixed amount of one element will combine with the other element so that the ratio of the masses of the other element is a small whole number |
|
|
Daltons Atomic Theory |
1. All matter is made up of atoms, which are indestructible and indivisible. 2. All atoms of a given element are identical in all their properties. 3. Compounds are formed by a combination of two or more different kinds of atoms. 4. A chemical reaction is a rearrangement of the atoms that exist in the substances which are reacting. |
|
|
What is wrong with Daltons Atomic Theory |
Atoms are not indestructible or indivisible. All atoms of a given element are identical in their chemical properties. |
|
|
Isotopes |
Two or more atoms of the same element that have different numbers of neutrons |
