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Particle Physics
Relatively recent experimental results have confirmed what philosophers throughout history had theorized all along; that all matter is made up of elementary particles. Those curious about this cutting-edge field of physics known as particle physics should post their questions here, including those about fundamental particles, fundamental forces, Grand Unified Theories, and the extraordinary devices that have been or need to be engineered to research them.
3,842 Questions
Is mass of electron nearly 1840 times less the mass of proton?
Electron is the lightest sub atomic particle
it is 1836 times less than as that of the mass of the proton
it's mass is 9.1*10-31kg
How many electrons levels does potassium have?
Potassium is in the 4th period and has 4 energy levels.
When an atom decays radioactively does it lose protons?
There are various different forms of radioactive decay, and there is one which involves the loss of protons by emission of an alpha particle, which is equivalent to a helium nucleus, containing two protons and two neutrons.
How many neutrons are in an atom with the mass number being 186?
The atomic number (number of protons) of the element is needed to tell the number of neutrons.
Mass number = atomic number + number of neutrons.
What is the change in atomic number when an atom emits a positron?
Emitting a positron, turns a proton into a neutron. So the atomic number goes down by 1, while the mass number remains the same.
How is the existence of the neutrino confirmed?
Actually, we can't even confirm the existence of atoms, let alone subatomic particles. But when scientists conduct experiments, they come to the conclusion that the particles are indeed valid. The more discrete physics becomes, the more theoretical it is.
What is the modern description of the electrons in atoms?
There are two main models used today one being the bohr model and then there's the quantum mechanical modal
What is the abbreviated electron configuration for B?
The electron configuration of boron is [He]2s2.2p1.
What is a 1976 bicentenial Standard model Ruger worth?
$1000-1500 depending on the condition of the stock blueing and action.
What does a transmission electron microscope and a scanning electron microscope have in common?
These are both high resolution microscopes that both use electron beams.
What is the charge of the ion typically formed by lead when it loses 4 electrons?
Natural lead is an electrically neutral atom. Thus, when it loses 4 electrons it loses 4 units of negative charge. This gives the lead ion 4 units of positive charge, or Pb4+.
What is the yield in kilotons of two grams of antimatter?
Using E=mc2 2g of antimatter will yield the equivelent of 42.962 kilotons of TNT.
When was the neutron bomb invented?
Credit to this invention usually goes to Lawrence Livermore Lab's Samuel Cohen in 1958. The ERW was tested in 1963. Development was halted by President Carter in 1978 and restarted by President Reagan in 1981. Some weapons were retired in 1992 by President George Bush. The last warhead was dismantled in 2003.
What element has twice as many protons as cobalt?
Cobalt has 27 protons. The double of 27 is 52, and the atom with 52 protons is tellerium.
What has the same amount of protons and electrons?
A neutral atom does, because the negative and positive charges balance to even out the charge. It is the opposite of an ion.
How many protons neutron and electrons are in lithium?
The atomic number of lithium (Li) is 3, and so it has 3 protons in the nucleus. The number of neutrons depends on which isotope of lithium you have. The most common isotope (92.5%) is 7Li with 4 neutrons.
A neutral atom of lithium has three electrons in it. Lithium has two electron shells that have electrons in them. The 1s shell has a pair of electrons in it (the maximum), and the 2s shell has one electron in it. Note that this is a neutral atom of lithium, and lithium is reactive. It would like to loan that 2s electron out if it can. It will react with air, either with the oxygen in it or the moisture, if there is any.
See the Related Questions below for more information about the particles in the nucleus.
What is the charge of an ion that contains 16 protons?
i think it depends how many electrons it has. then you do something like subtract the electrons from the protons. electrons are negative, protons are positive.
How many electrons does a americium have?
Americium's atomic number is 95. Therefore, it has 95 protons per atom, all of which have a +1 charge. For it to be electrically neutral then, americium must also have 95 electrons.
