Question | Answer |
What does atom mean in Greek | indivisible |
The transformation of a substance or substances into one or more new substances is known as a | Chemical reaction |
The law that states that mass is neither created nor destroyed during ordinary chemical reactions or physical changes | law of conservation of mass |
The fact that a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of
the sample or source of the compound is known as | the law of definite proportions |
If two or more different compounds are composed of the same two elements, then the
ratio of the masses of the second element combined with a certain mass of
the first element is always a ratio of small whole numbers | law of multiple proportions |
Dalton's Atomic Theory 1 -2 Says | 1. All matter is composed of extremely small particles called atoms.
2. Atoms of a given element are identical in size, mass, and other properties;atoms of different elements differ in size, mass, and other properties. |
Dalton's Atomic Theory 3 - 5 says | 3. Atoms cannot be subdivided, created, or destroyed.
4. Atoms of different elements combine in simple whole-number ratios
to form chemical compounds.
5. In chemical reactions, atoms are combined, separated, or rearranged. |
the fact that chemical reactions involve merely the combination, separation, or rearrangement of atoms and that during
these processes atoms are not subdivided, created, or destroyed by what law | The Law of the conservation of mass |
An atom of carbon, C, and an atom of oxygen,
O, can combine chemically to form | a molecule of carbon monoxide (CO) |
the law of multiple proportions, in the case of the carbon oxides, the 2-to-1 ratio of oxygen masses results because | Carbon dioxide always contains twice as many atoms of oxygen per atom of carbon as does carbon monoxide |
All matter is composed of | atoms |
atoms of any one element differ in properties from | atoms of another element which remains unchanged |