Compare the relative size and density of an atom to its nucleus?
You are probably familiar with the textbook diagram of an atom that fits neatly on the page. However, the reality will get you thinking how really empty space is: If a proton were the size of a marble an electron would be about the width of a human hair. With that scale the electron's orbit would be about 2 1/2 miles away from the proton.
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That depends on your definition of 'nucleus'. The nucleus or core of an atom is, obviously, smaller than the atom as a whole. But seeing as you placed this question in biology…, a cellular nucleus is many billions of times the size of an atom.
the radius of a cation is greater than the radius of its neutral atom
The radius of an anion is greater than the radius of its neutral atom.
If the total atom was the size of a football field, then the nucleus would be the size of an apple in the middle of the field.
The nucleus is one ten thousandth of the size of the rest of the atom.
My old chemistry professor used this analogy: If you put a pea in the middle of a football stadium, the outermost seats would be where the first electron orbital is.
We know that the nucleus of an atom contains the nucleons, the protons and neutrons that make up that atom. This is almost all the mass of the atom, and these protons and neut…rons are bound very tightly. That translates into the fact that the nucleus takes up almost none of the volume that the atom as a whole occupies. The orbiting electrons that are in the electron cloud actually define the volume of the atom. And that atom's volume is really large compared to that of the nucleus. We might say that the nucleus contains almost all of the mass of the atom, and takes up almost none of its volume. The difference between the size of the atomic nucleus and the size of the whole atom is that dramatic.
We have two examples: the first is, if the Atom is the size of a New York baseball stadium, then the nucleus is the size of a flea perched on the pitcher's mound; and next, if… the atom is one mile [1.6 km] across the atomic nucleus would be two-thirds of an inch [< 2 cm] in diameter. From this we can state that the Atom is 99.9999 % empty space.
Think of the sun as the nucleus and the oort cloud (past pluto) as where the electron orbitals start. The size (volume) of the nucleus is tiny compared to the size (volume) o…f the atom (defined by the extent of the electron cloud).
Incredibly small. About 1/10000 the diameter.
Explain how the relative sizes of the nucleus of an atom can be compared to that of a stadium and a marble?
Because the size of an atom is about 100-500 nm, while the size of the nucleus is about 0.001 nm. In other words, the nucleus is from to 10 000 to 50 000 times smaller than… the atom in which it resides. By analogy, the size of a marble of 1 cm can be compared to the size of a stadium of 100-500 m
the average atom is 10,000 times larger in diameter than the nucleus
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it is 4.52481 tenths of a milligram Dr. Zachary Fitzsimmons
The atom is many times larger than the size of the nucleus, about as much larger as a cathedral is compared to a housefly. However, it should be noted that the "size" of anyth…ing as small as an atomic nucleus or even a whole atom can not, because of the Heisenberg Uncertainty Principle, be specified as precisely as the size of a conventional object. Not only that, but the protons and neutrons that combine to form atomic nuclei are composed of quarks that are probably not things. According to quantum mechanics, "quark" is more like a verb than a noun.
In Nuclear Physics
Electrons have nearly no mass, if not none at all. The density is in the nucleus.