What is the energy (in electron volts) of a 170 GHz (1 gigahertz 109 Hz) microwave photon?
for a photon
energy= Planks Constant * frequency
and
frequency= speed of light/wavelength
so
E= hc/(wavelength)
h= 6.63E-34 J/s
c= 3E8 m/s
Plug n' Chug
What is the total no of protons and neutrons in He atom?
He is helium: it has 2 protons, 2 electrons and 2 neutrons, only less than 0.001% of He has only 1 neutron (He-3 isotope)
What is the evidence for quarks?
Every particle that should exist if quarks are real has been found.
No particle that should not exist if quarks are real has ever been found.
The results of in-elastic scattering between hadrons fits perfectly with quark.
The hypothesis of charm quarks predicted experimental results that were almost perfectly replicated with the discovery of the psi-particle.
In other words, the quark hypothesis matches observation perfectly.
That's about as strong of evidence as can exist.
What is the electron configuration of indium?
The noble gas electron configuration indium is[Kr]4d10.5s2.5p1.
What is a model in which the arrangement of the electrons are shown?
A model that illustrates the arrangement of electrons in an atom is the Bohr model or the quantum mechanical model. These models depict the distribution of electrons in different energy levels or orbitals around the nucleus of an atom. Each model helps visualize the structure of an atom and how electrons occupy specific regions around the nucleus based on their energy.
Molality (m) is calculated by dividing the number of moles of solute by the mass of the solvent in kilograms and is expressed in mol/kg. The formula for molality is: [ molality (m) = \frac{moles\ of\ solute}{mass\ of\ solvent\ in\ kg} ]
How many valence electrons are there in an atom of gallium?
Gallium is a mono-atomic metal element. So their atoms are atoms, and as many as you have!
Which subatomic particle carries a negative charge?
An electron is the subatomic particle that has a negative charge.
A proton has a positive charge and neutron has a neutral charge.
These three together form all known particles (except hydrogen, that doesn't normally have a neutron). The protons and neutrons form the nuclie. The electrons form shells around it, they are held in place by there attration to the protons. Ions are atoms that have lost or gained electrons. e.g.
[Zn]+1is a zinc alom that has gaind an electron.What subatomic particle helps identify the element's identity?
There is no individual sub-atomic particle that is responsible for the identity of an element. It is the way the electrons, protons and (neutrons) are arranged in an element that gives it it's identity.
What is the importance of valence electrons in the organization of the periodic table?
The importance of valence electrons is that atoms in the same group ("groups" in the periodic table are the vertical columns- for example, nickel and platinum are in the tenth column; therefore, in the same group). Atoms of elements in the same group have the same number of valence electrons, so they have similar properties. Hope that helped with your homework! ;D
What have almost equal masses to the proton?
No, it isn't. The mass of an electron is significantly smaller than that of a proton.
The mass of 1,800 electrons is about the same as the mass of one single proton.
The antiparticle of the electron, the positron, has the same mass as the electron.
the mass of the electron is not the same to the mass of the proton
According to the oclet rule an atom with two electron shells is most stable when it contains eight?
The octet rule is a simple rule of thumb that states that atoms tend to combine in such a way that they each have eight electrons in their valence shells, giving them the same electron configuration as a noble gas. The rule is applicable to the main-group elements. In simple terms, molecules or ions tend to be most stable when the outermost electron shells of their constituent atoms contain eight electrons.
ELECTRONS
CERN is an organisational headquaters of scientists, based in Switzerland, which houses a large hadron collider (the LHC). By smashing particles together at great speed, it's hoped that the LHC will be able to recreate the conditions present at the beginning of the universe (the big bang). The scientists are examining the microscopic collisions, which are created by shooting atoms around the huge tunnels of the LHC. Please also see this article for further easy to understand information about CERN: http://scientificinquiry.suite101.com/article.cfm/cern_the_big_bang_machine
Are atoms composed of protons and neutrons and electrons?
Yes, the center (nucleus) contains positively charged particles (protons) and neutral particles (neutrons) that are surrounded by negatively charged particles (electrons) that orbits around the nucleus. Depending on the atom and number of electrons, the electrons can be found in different types of orbits: spherical, coplanar, pyramidal, quadrilateral and others.
Why cloth can dry faster in windy day?
They dry quicker because when its like not windy the cloth just drips
but when the wind comes it moves around and the wind drys it
help ya out a bit
better say thanks and offer something good
or i wont help you any more..and worse
The electron is considered to be an elementary particle and not composed of other particles, so there are no quarks in an electron. Particles composed of quarks are called Hadrons, the best-known being the Proton and the Neutron. The electron, on the other hand, is a Lepton.
Why electron is lightest subatomic particle?
Out of electrons, protons, and neutrons, neutrons are the heaviest subatomic particle, with a mass of about 1838 times that of the electron.
(If you are asking about electrons, up quarks, and down quarks, then electrons still aren't the heaviest Down quarks are the heaviest, with almost 10 times the mass of an electron.)
Why are electrons attracted to the nucleus?
Electrons are attracted to the nucleus because of the electromagnetic force between the positively charged protons in the nucleus and the negatively charged electrons. This force of attraction keeps the electrons in orbit around the nucleus.
Where are each of the subatomic particles found?
There are something like several hundred subatomic particles. Most are only found under very special circumstances, such as the extreme conditions created in a particle accelerator. Here are some special cases:* The proton and neutron are found in the nucleus of the atom.
* The electron is found surrounding the nucleus of the atom.
* The quarks are found inside protons and neutrons (and other particles).
* Gluons hold the quarks together.
How many valence electrons protons neutrons and electrons does aluminum have?
The element aluminum has 13 protons. It will have 13 electrons in its neutral state, though aluminum loans out electrons to form bonds. Under these circumstances, it will have 10, 11 or 12 electrons.
The only stable isotope of aluminum (aluminum-27), and basically the only one found in nature, has 14 neutrons in it. (There have been, however, investigators who report a trace of Al-26, which has 13 neutrons in it.) We should note that we have synthesized a number of isotopes of aluminum in the lab. Links can be found below for more information.
The number of protons in an atom is called the atomic number. Therefor, aluminium has 13 protons. The mass number is the number of protons and neutrons. Therefor, (27-13=14) aluminium has 14 neutrons. The number of protons is equal to the number of electrons, Therefor, aluminium has 13 electrons.
Do electrons flow through a voltmeter?
The question succeeds brilliantly in avoiding the target cleanly and completely.
Of the three units listed, none is used to measure electrical 'current'. The unit
of current is the "ampere".
What is a bond in which atoms share electrons?
A covalent bond is a type of bond in which atoms share electrons. This sharing of electrons allows each atom to achieve a full outer electron shell and become more stable. Covalent bonds are typically found in molecules composed of nonmetals.
Which has a subatomic particle of a mass of 1.67 times 10-27 kg?
The proton and the neutron have mass each of one atomic mass unit. Actually they are not quite the same, but they are very close.
Who believed the exact location of electrons at a given instance to be uncertain?
In our Universe, there is a limitation of how precisely one can simultaneously locate an object and describe its motion. This limitation is NOT due to our lack of good instruments or cleverness, it is a FUNDAMENTAL FACT of existence.
The product of the uncertainty in location and the uncertainty in momentum is on the order of Planck's Constant -- a pretty small number for most objects. However, by the time we are analyzing the location and momentum of electrons, the fundamental uncertainty (note the adjective -- again, it is NOT because we lack good instruments) becomes on the order of the size of an atom. At that level, it becomes meaningless to say, "The electron is within this volume" -- our Universe limits us to saying, "This is the probability of an electron being within this volume."
Who invented the hadron collider?
A scientific research organisation called CERN made the LHC. It is completely non-commercial, and is funded by a consortium of 20 nations with the intent of advancing research in particle physics.