Term
| what is matter that has the same properties and compostition throughout called? |
|
Definition
|
|
Term
| what is the result when two pure substances are combined so that each of the pure substances retains it own properties? |
|
Definition
|
|
Term
| in general, what are nonmetals? |
|
Definition
| gases at room temperature |
|
|
Term
| in general, what are metals? |
|
Definition
|
|
Term
| why does water and hydrogen peroxide have different properties? |
|
Definition
| one contains a greater percentage of oxygen that another |
|
|
Term
| the millions of compounds that exist are made from approximately_____elements. |
|
Definition
|
|
Term
| which particles have almost the same mass? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| who stated that almost all the mass of an atom is located in its nucleus? |
|
Definition
|
|
Term
| who stated that different elements are made of different types of atoms? |
|
Definition
|
|
Term
| who stated that cathode rays are made up of negtively charged particles? |
|
Definition
|
|
Term
| who used the cathode-ray tbe to discover steams of particles? |
|
Definition
|
|
Term
| all matter is made up of particles called______. |
|
Definition
|
|
Term
| elements on the left side of the periodic table are classified as________. |
|
Definition
|
|
Term
| elements that have properties halfway between those of metals and nonmetals, are classified as____________. |
|
Definition
|
|
Term
| most of the mass of an atom is located in its_______. |
|
Definition
|
|
Term
| the stream of particles in a cathode-ray tube travels from the cathode to the _________. |
|
Definition
|
|
Term
| the likely location of the negatively charged particles in an atom is called the_________ _________. |
|
Definition
|
|
Term
| atoms of the same element containing different numbers of neutrons are called_______. |
|
Definition
|
|
