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E. Rutherford
Arjun Bednar
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Rutherford said that almost all the mass of an atom is located in its what?
Rutherford discovered in the early 1900s that most of an atom's mass is located in its nucleus.
Who said most of an atoms mass is in the nucleus in an atom?
Ernest Futher Ford
Why is it said that the nucleus of an atom contains almost the entire mass and not the entire mass?
Yes. An electron, one of those little negatively charged critters that forms up around the nucleus of an atom, has little mass compared to the nucleons. (Nucleons are protons and neutrons - the particles that make up the nucleus). In fact, the mass of an electron is less than 1/1800th the mass of a proton. All the electrons in any given atom account for only a tiny amount of the total mass of that atom. Almost all the mass is accounted for the protons and neutrons (if any) in the nucleus. It's that simple, and you already show that you know it.
What part of the atom accounts for most volume?
the nucleus ^^to whoever wrote this answer.. you are stupid. the nucleus is where most of the MASS is contained. so the correct answer is that the volume is found around the nucleus NOT the nucleus... to the above who said he was stupid, you are stupid.
What value did Rutherford's model of an atom have over Thomson's model?
Thomson said that charges are distriduted evenly in entitre atom. but Rutherford said that charges(electrons) are continuously revolving around the nucleus,a small region where the entire mass of atom is subjected to be. Thomson failed to put forward the concept of nucleus and orbitals.
What scientist said the atom has a nucleus?
Rutherford
What is 99.9 percent of the mass of an atom?
[The nucleus has more massive parts (protons and neutrons) than the surrounding electron cloud]. This is because 99.9999 % of the volume of space that the Atom occupies is Empty Space. Below is another person's answer... longer and more complicated than mine. it was said to have a repeated answer. The nucleus accounts for 99.9% of an atom's mass simply because neutrons and protons are much more massive than electrons. Mass of proton: 6726 x 10^(-27) kg Mass of neutron: 1,6749 x 10^(-27) kg Mass of electron: 0,00091x10^(-27) kg Even though the electron cloud accounts for most of the atom's area, a huge percentage of the cloud is empty space, and the electrons within it are minuscule to begin with. The highly dense nucleus contains most of the mass.
Electrons farther from the nucleus are said to be of?
"higher energy"
What scientist said most of the mass of the atom is in tiny dense positively charged nucleus?
Ernest Rutherford suggested that most of the mass of the atom is located in the nucleus. He came to this conclusion after finding the results on his famous gold foil experiment. This is where he fired radio active particles through very thin metal foils, and detected them using screens covered in zinc sulphide.
Why do scientists say that electrons most effect an atom's size while protons and neutrons most effect an atom's mass?
electrons buzz around the atomic nucleus. low level/lower energy electrons have orbits tighter/closer to the nucleus, but higher/more excited electrons have a broader orbit ie: further away from the nucleus. this looks a little like a small or big cloud around the nucleus, making it look bigger. the protons and neutrons form the nucleus, and the futher along the periodic table you move, the more of them there are in each atom. because they have mass, more of the means more mass, and I'm pretty sure that they have more mass than electrons. it is said that protons and neutrons are made up of subatomic particles, like quarks, which have no mass. quantum physicists at the moment claim that bosons hold these quarks together, and another undiscovered boson gives them mass
Who said An atom has a nucleus that is very small?
I believe you are refering to Ernest Rutherford.
Why is Rutherfords model called the planetary model?
Rutherford's experiment is called the Planetary Experiment because of Rutherford's concentration on most of the atom's mass into a very small core. The core would contain most of the atom's mass and in the same way the sun contains most of the solar systems mass.
