Atoms and Molecules Flashcards
(20 cards)
0
Q
Molecules
A
- Two or more atoms joined together in a specific geometrical arrangement
1
Q
Atoms
A
- submicroscopic particles that constitutes the fundamental building blocks of ordinary matter
2
Q
Matter
A
- Anything that occupies space and has mass.
- classified by its state (physical form) and composition (basic components that make it up)
3
Q
States of Matter
A
- Solid
- Liquid
- Gases
4
Q
Chemistry
A
The science that seeks to understand the behavior of matter by studying the behavior of atoms and molecules
5
Q
Law of conservation of mass
A
- Lavoisier
- “In a chemical reaction, matter is neither created nor destroyed.”
6
Q
Substance
A
- A specific instance of matter, such as air, water, or sand
7
Q
State
A
- A matter’s physical form
8
Q
Composition
A
- A matter’s basic components that make it up
9
Q
Solid Matter
A
- Atoms or molecules are packed close to each other in a fixed location
- Atoms and molecules vibrate but do not get passed each other
- May be crystalline or amorphous
10
Q
Crystalline
A
- Atoms or molecules are in patterns with long range, repeating order
11
Q
Amorphous
A
- Atoms and molecules do not have any long range order
12
Q
Liquid matter
A
- Atoms and molecules are packed almost as tight as in solid matter, but are free to move relative to each other, creating a fixed volume, but not shape.
13
Q
Gaseous Matter
A
- Atoms and molecules have lots of space
- free to move around
14
Q
Pure Substance
A
- made up of only one component
- composition is invariant
15
Q
Components
A
Individual atoms or grouped atoms
16
Q
Invariant
A
- Composition does not vary from one sample to another
17
Q
Mixture
A
- two or more components mixed together in proportions which may vary from one sample to another
18
Q
Element
A
- A pure substance which cannot be broken down chemically into simpler substances.
19
Q
Compound
A
- composed of two or more elements in fixed, definite proportions
