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Chem Chap 3
Section 1
| 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 |
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tbstinso
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