Term
| What are the 10 naturally occuring atoms that is bonded with more than one atom. |
|
Definition
O2
O3
N2
H2
F2
Cl2
Br2
I2
S8
P4 |
|
|
Term
|
Definition
| one of a class of substances that cannot be separated into simpler substances bychemical means. See also chart under periodic table. |
|
|
Term
|
Definition
| composed of two or more parts, elements, or ingredients: Soap is a compound substance |
|
|
Term
|
Definition
| |
any combination of substances that has uniform composition and properties;
a mixturethat is uniform throughout
|
|
|
|
Term
|
Definition
| |
any combination of substances that does not have uniform composition and properties;a mixture of physically distinct substances with different properties |
|
|
|
Term
| Physical change vs chemical change |
|
Definition
| The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. Although we call them physical "reactions," no reaction is actually occurring. In order for a reaction to take place, there must be a change in the elemental composition of the substance in question. Thus, we shall simply refer to physical "reactions" as physical changes from now on. |
|
|
Term
Atom,Molecule,hydrate
give examples and tell difference |
|
Definition
an atom is the simplist form (S)
molecule is made up of atoms.(H2O)
a hydrate has water in it.(H2O2) |
|
|
Term
|
Definition
| All matter is made up of tiny submicroscopic things known as atoms. |
|
|
Term
| The Law of definite proportions |
|
Definition
ohn Dalton (1803) stated this law as 'when two elements combine with each other to form two or more than two compounds, the massof the element which combine with the fixed mass of the other bears a simple whole number ratio'.
Carbon monoxide (CO): 12 parts by mass of carbon combines with 16 parts by mass of oxygen. |
|
|
Term
how many atoms?
2H2Cl5+6O2C2 |
|
Definition
| 38 with margin of error +-1 |
|
|
Term
|
Definition
| when one substance is changed into two or more through a checmical reaction. |
|
|
Term
| example of Pure Substances |
|
Definition
| Elements and compounds are pure substances |
|
|
Term
|
Definition
| Homogeneous Mixtures are solutions |
|
|
Term
|
Definition
| In a heterogenous mixture the different"layers" that is created. |
|
|
Term
Scanning Tunneling Microscope
|
|
Definition
| A instrument that allows people to map the surface of a solid with great detail. |
|
|
Term
|
Definition
| a element that is not combined with another element in a compound |
|
|
