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Atomic nucleus - Wikipedia, the free encyclopedia

The nucleus of an atom consists of protons and neutrons (two types of ...


From Yahoo Answers

Question:The answer is 10^-5 How do you get the answer?

Answers:Hi Stuart, The Bohr radius of an atom is: a0 = Bohr radius = 0.53 Angstrom = 5.3 x 10^-11 m The radius of a typical nucleus is r = radius of typical nucleus = 10^-15 m So, r / a0 = 10^-15 / 5.3x10^-11 = 1.88 x 10^-5 So that's how you get the ratio to be ~10^-5. http://en.wikipedia.org/wiki/Nuclear_radius http://en.wikipedia.org/wiki/Bohr_radius That's your answer! ANagah.

Question:Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm, and the radius of the atom is approximately 70 pm. Calculate the volume of the nucleus and the volume of the atom. V nucleus= V atom= What percentage of the carbon atom's volume is occupied by the nucleus? Vnucleus/Vatom=

Answers:Estimate the volume to be approximated by the shape of a sphere: V = (4/3)(pi)(r^3) V(nucleus) = (4/3)(pi)(2.7x10^-3 pm)^3 = 8.2x10^-5 pm^3 V(atom) = (4/3)(pi)(70 pm)^3 = 2.0x10^4 pm^3 The percentage of the volume of the atom occupied by the nucleus is: [V(nucleus)/V(atom)]x100% [(8.2x10^-5 pm^3)/(2.0x10^4 pm^3)] x 100% = (4.1x10^-7) % That's virtually no space at all! Thinking about it is just mind-blowing.

Question:Why is the radius of a neutral metal atom always larger than the radius of a positive ion? A. The nucleus repels the remaining electrons. B. The positive ion has lost its outer level. C. The atomic orbitals contract all by themselves. D. The number of principal energy levels is always increased. E. The metal's outer level is completely filled.

Answers:B

Question:Do you guys have a picture or drawing of an atomic nucleus for calcium ? thanks

Answers:The nuclear orbitals for both protons and neutrons have the same shapes as their electron counterparts. The nuclear orbitals, however, are filled in a different order. A Ca-40 nucleus would contain 20 protons (one set of orbitals) and 20 neutrons (a different set of orbitals). Both sets would fill as follows: 1s1/2 2 particles 1p3/2 4 particles 1p1/2 2 particles 1d5/2 6 particles 2s1/2 2 particles 1d3/2 4 particles Total 20 particles A Ca-48 nucleus would have the above configuration for protons, but would have an additional orbital set for neutrons, namely: 1f7/2 8 neutrons You have seen illustrations of s, p, d, and f orbital sets for electrons. Now imagine all of these overlapping, and double that for the two types of particles in the nucleus. It would be like Picasso on drugs.

From Youtube

Nucleus of an atom :Nucleus of an atom was first discovered by deflection of positive particles passed through a thin foil of gold.

An atomic nucleus and Under gravity. :"Reproduction video" It is an individual experiment conducted by my original technique. The coloring water is a soda water. The generated bubble is carbon dioxide. ***Carbon dioxide decreases the neurologic function as used for anesthetizing.*** The space suit accumulates the atmospheric pressure from the space platform and because the carbon dioxide exhaust efficiency of the human body falls low, carbon dioxide is accumulated. Therefore, the sense such as the tip of a finger is paralyzed and the obstacle is caused to the activity with the space suit. !express# !metadata#!version#v1.0.r291!/version#!format#1.001!/format#!totalTime#100634!/totalTime#!width#400!/width#!height#300!/height#!maxSceneSize#3436!/maxSceneSize#!clientPublishTime#Fri Nov 23 02:21:00 GMT 0900 2007!/clientPublishTime# !/metadata# !scenes#!scene/#!scene# !asset path="www.youtube.com type="TransitionContent"#!stamp time="47981"# !direction#stop!/direction# !z#5!/z# !duration#0!/duration# !display#false!/display#!/stamp#!stamp time="91759"# !direction#forward!/direction# !duration#1000!/duration# !display#true!/display#!/stamp#!stamp time="92759"# !direction#reverse!/direction# !duration#1001!/duration# !display#true!/display#!/stamp#!stamp time="93760"# !direction#stop!/direction# !display#false!/display#!/stamp# !/asset#!/scene#!scene# !asset path="www.youtube.com type="TransitionContent"#!stamp time="92759"# !direction#stop!/direction# !z#5!/z# !duration#0!/duration# !display#false!/display#!/stamp ...