An atom has a very small nucleus surrounded by an electron "cloud." The figure below represents the nucleus with a diameter of about 2 mm and describes the electron cloud as extending over 200 m. If the diameter of an atom is 1 x 10-° cm, what is the approximate diameter of its nucleus?

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A: 1 cm3 of copper with the density 8.93 g/cm3, whose number of atoms is to be determined.

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Q: atoms

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Q: Does any element with Z ≤ 92 match the description? An element in period 3 and group 8A.

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A: Given; A diagram showing different elements.

Q: The element Mg Ca Cs Ba Be is the most similar to sodium in chemical and physical properties.

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A: The average atomic mass of an element can be calculated as shown below.

Q: Does any element with Z ≤ 92 match the description? An element in Period 5 and group 7A.

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Q: (a) What percentage of the electrons originally in the cube was removed? % (b) By what percentage…

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Q: What element is defined by the following information?    p+=20  n ^o=20   e^-= 20

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Q: atoms of each element are

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Q: Which of the following statements must be true for the following equation to apply?…

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Q: What element is x? O Mercury O Bromine O Rhodium O Xenon O Ytterbium

A:

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Q: Determine the thickness of an aluminum foil in atoms with the following information: Weight: 0.633…

A: Given the volume, we can determine the thickness of aluminum foil.

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.