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CHE 106 Chapter Notes - Chapter 2: Atomic Number, Chemical Formula, Henri Becquerel

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cyanherring316
3 Oct 2017
School
Syracuse University
Department
Chemistry
Course
CHE 106
Professor
W.Zheng

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Document Summary

Each element is composed of extremely small particles called atoms. All atoms of a given element are identical, but the atoms of one element are different from the atoms of all other elements. Atoms of one element cannot be changed into atoms of a different element by chemical reactions; atoms are neither created nor destroyed in chemical reactions. (law of conservation of mass) Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms. (law of constant composition) Law of multiple proportions: if two elements a and b combine to form more than one compound, the masses of b that can combine with a given mass of a are in the ratio of small whole numbers. Subtatomic particles: an atom is composed of these; electrically charged particles.

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Related Questions

What are the main ideas in Dalton's atomic theory?

1- Atoms of one element cannot change into atoms of anotherelement.

2 - Atoms combine in simple, whole number ratios to formcompounds.

3 - Each element is composed oftiny, indestructible particles called atoms.

4 - Nuclear particles combine in simple, whole number ratios toform atoms.

5 - Each atom is composed of elements.

6 - All atoms of a given element have the same mass and otherproperties that distinguish them from the atoms of otherelements.

7 - Atoms of one element can change into atoms of anotherelement.

1) Which is not part of Dalton’s atomic model?

a) Elements are composed of minute, indivisible particles called atoms.

b) Atoms of the same element are alike in mass.

c) Atoms of the same element can be different in size.

d) Chemical compounds are composed of two or more atoms of different elements.