Particle Physics

The mass of a positron is approximately 9.1093826(16) × 10−31 kg. The positron and the electron are anti-particles of each other, and you can find out more about the positron at the Wikipedia article on that subject. A link to their post can be found below. There is also a link to a related question on the nature of the positron. That's down there, too.

A substance that accepts a proton is called a base. Bases are typically classified as proton acceptors because they can donate a pair of electrons to form a new chemical bond with a proton. This process results in the formation of a conjugate acid.

You take the atomic mass (the small number in the upper left corner of the square in the periodic table) and subtract the atomic number from it (the big bold number on the periodic table)

The first particle accelerator was built more around the time of 1927 (resonance linear accelerator) about eight years after Rutherford first split the nucleus. But not too sure one that, I have other sources saying 1929, but definitely not as late as 1972. I do know that the first successful cyclotron (a type of circular particle accelerator, which was basically the ground work for the cynchrocyclotron spelling?) was built and tested in 1931 by Ernest Lawrence.

Protons and neutrons, electrons orbit the nucleus.

Metals are elements belonging to first , second or third group. They have one ,two or three valence electrons (electrons present in the last orbit of an atom). They lose this electrons to gain stability as they are highly unstable and by doing so they react .

NOTICE:

An atom can only lose the electron if an atom of other element is ready to take it.

Paul Dirac It was Paul Dirac who suggested that there might be an "antiparticle" to the electron in 1928. His mathematical statement, which came to be called the Dirac equation, was an astonishing breakthrough in the understanding of elementary particles. In 1932, Carl D. Anderson actually discovered the positron and confirmed Dirac's postulation. The suggestion of the existence of the anti-electron and its discovery opened the door to the existence of other antimatter particles. It should be noted that Caltech graduate student Chung-Yao Chao is often cited as the first person to detect the positron (1930), but did not identify the little critter. Links are provided below for more information.

The nucleus of an atom is made of neutrons and protons. Electrons move around the outside of the nucleus. The number of electrons around an atoms nucleus compared to the number of protons in the nucleus determines the charge of an atom, and the charge of an atom effects the way that an atom reacts with other atoms.

There are four major types of force called as universal or fundamental forces of nature.

They are:

1. Gravitational Force

2. Electromagnetic Force

3. Strong Nuclear Force

4. Weak Nuclear Force

• In the last orbit of Chlorine includes 7 electrons.
• Name: Chlorine
  • Symbol: Cl
  • Atomic Number: 17
  • Atomic Mass: 35.4527 amu
  • Number of Protons/Electrons: 17
  • Number of Neutrons: 18

The 'rest mass' of the photon is zero ... but the photon is never at rest, and it

has plenty of mass at the speed of light, at which it is always traveling. so that

let's the photon out.

Amongst particles that actually have rest mass, but not much of it, the neutrino

probably has the least.

try this site- http://news.bbc.co.uk/1/hi/sci/tech/7567926.stm Basically there are a number of anomalies and unsatisfactory answers in our present knowledge of matter and the beginnings of the universe. Scientists will be looking for 1)the elusive Higgs-boson which will explain why particles have mass,2) the missing anti-matter in the universe (on the assumption that equal amounts were 'created' in the Big Bang, 3) superparticles- squarks, selectrons etc predicted in some theories,4) multi-dimensional theories which have been floating around for decades and presumably 5) any other interesting lines that emerge.

It is K with one dot so:

K .

The reasoning behind this is that you put the highest energy level on the dot notation.

Electron Configuration notation for Potassium is:

1s2; 2s2, 2p6; 3s2, 3p6, 4s1.

It is also in the third row, so that is why it moves up to the fourth energy level.

Hydrogen electron configuration will be 1s1.

The current model that shows electrons traveling in specific energy levels around a nucleus of protons and neutrons is the Bohr model of the atom. In this model, electrons occupy discrete energy levels known as shells and move in orbits around the nucleus.

Atoms are made up of a central nucleus containing protons and neutrons, and electrons moving around outside of the nucleus. These electrons are relatively far away from the nucleus and thus are the first particles that would notice if another atom was around. Therefore, when a compound is formed, the electrons are the ones that make it happen.

Yes, a stable atom can have an orbital with three electrons. An atomic orbital can hold a maximum of two electrons with opposite spins, following the Pauli exclusion principle. The third electron would go into a different orbital within the same energy level.

that two crackers to not make a pretzell unless you subtract it from cotton candy

== silver-107 and silver-109 have 60 and 62 neutrons, respectively. There are many isotopes of silver having a neutron count from 46 to 83.

8 protons 8 electrons and 8 neutrons. Oxygen has the atomic number 8, so it has 8 protons, 8 electrons. The number of neutrons would be mass number-atomic number, so 15.9994-8=7.9994, so rounding would be 8 neutrons.

The force that holds protons in the nucleus is called the strong nuclear force. It is one of the four fundamental forces of nature and is responsible for binding protons and neutrons together in atomic nuclei.

Rubidium has 5 electron shells.

The electron configuration of rubidium is [Kr]5s1.

Count protons. The proton count determines which element you have. Always. Atomic number is the number of protons in the nucleus of an atom, and hydrogen is 1, helium is 2, lithium is 3, and so on. The neutron count can vary and will result in different isotopes of a given element. But the elemental identity of a given atom is based on the number of protons in the nucleus.

A neutron is a subatomic particle with no charge.