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;
12 Cards in this Set
- Front
- Back
Density |
d = mass/volume = g/mL = g/cm^3 |
|
Pure Substances |
Is a particular kind of matter with a definite, fixed composition.
They are either elements (Cu, Au, O) or compounds (salt, sugar, water).
Can be seperated by chemical means |
|
Mixtures |
Is a material containing two or more substances and can be either heterogeneous or homogeneous.
Mixtures are variable in composition.
|
|
Elements |
An element is a fundamental or elementary substance that cannot be broken down by chemical means.
Elements are the building blocks of all substances |
|
Atoms |
An atom is the smallest particle of an element that can exist. It is also the smallest unit of an element that can enter into a chemical reaction. |
|
7 Diatomic Molecules |
Cl2 I2 Br2 H2 O2 N2 F2 |
|
Periodic Table Group Names |
8A - noble gases 7A - halogens 1A - alkali metals 2A - alkaline earth metals B groups - transition metals
|
|
Molecule |
A molecule is the smallest uncharged individual unit of a compound formed by the union of two or more atoms.
IE: water is a typical molecular compound |
|
Compounds |
A compound is a distinct substance that contains two or more elements chemically combined in a definite proportion by mass.
Compounds can be decomposed chemically into simpler substances; compounds and or elements. |
|
Ion |
An ion is a positively or negatively charged atom(s).
An ionic compound is held together by attractive forces that exist between positively and negatively charged ions.
cation = positive
anion = negative |
|
Physical properties |
Physical properties include: *color *taste *odor *state of matter (solid, liquid, gas) *density *melting point *boiling point |
|
Chemical Properites |
The ability to form new substances, either by reaction with other substances or by decomposition |