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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

What is Ground-state electron configuration for Hg?

Long-hand version: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 Short-hand version: [Xe] 6s^2 4f^14 5d^10 Note: The "^" symbol means the the following number is in the form of a superscript.

Which two subatomic particles are found inside the nucleus of an atom?

It is the neutron and proton that make up the nucleus of an atom. The only exception is Hydrogen (isotope mass number 1), having only one (single) proton in its nucleus and no neutrons. All other atoms have a nucleus that is made up of combinations of these two subatomic particles.

Which subatomic particle is located in orbitals around the neucleus?

The electrons are the subatomic particles that are located in orbitals around the nucleus of an atom. They carry a negative charge and occupy different energy levels within the atom based on their quantum numbers.

When ice on a plate melts why does the plate cool down as well?

When ice is placed on a plate that is warmer than the ice, some of the heat energy from the plate is transferred to the ice. (This is due to the molecules in the plate transferring kinetic energy to those in the ice. The molecules in the plate crash into those in the ice, losing speed and giving the molecules in the ice more speed).

Since the heat energy is transferred away from the plate, the plate cools down. (The ice is not cooling down, it is heating up.)

Why is it that all of the sub shells in a given shell have the same energy in the hydrogen atom whereas in a many-electron atom the sub shells in a given shell do not have the same energy?

The hydrogen atom only has one energy level (shell). The first energy level also contains only one sublevel, 1s sublevel (subshell), which can only hold two electrons. When you get to the second energy level in the second period on the periodic table, it has two sublevels, the 2s and the 2p sublevels. Both of the electrons in the 2s sublevel have the same energy. The 2p sublevel can hold 6 electrons. All of the electrons in the 2p sublevel have the same energy, which is higher than the energy in the 2s sublevel. So, as we move down the periods on the periodic table, we move from the first energy level to the seventh energy level. Each energy level contains specific numbers of sublevels, and all of the atoms within a particular sublevel have equal energy.

Is negatrons a subatomic particle in an atom?

Now the term negatron is not used; in the past was rarely used to name an electron or an antiproton.

How do subatomic particles tells you what element it is?

Subatomic particles identify elements based on the number of protons in the nucleus. Protons give the element its identity, as each element has a unique number of protons. This number is known as the atomic number, and it determines how the element behaves chemically and physically.

How many unpaired electrons are there in Fe3 plus ion?

There are 4 unpaired electrons in the ground state electron configuration of an Fe atom. These 4 unpaired electrons are in the 3d subshell.

What charges do the subatomic particles carry?

The proton is positive, the electron is negative, the neutron is neutral.

What happen when electron change energy level?

When an electron changes energy levels in an atom, it absorbs or emits energy in the form of a photon. This photon can have a specific wavelength corresponding to the energy difference between the initial and final energy levels of the electron. This process is fundamental to the emission and absorption of light in atoms.

How do the different subatomic particles differ?

Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. Protons and neutrons are found in the nucleus of an atom, while electrons orbit around the nucleus. Protons and neutrons have approximately the same mass, while electrons are much lighter.

What type of particles flow between objects when they are charged by friction or conduction?

Electrons are the particles that flow between objects when they are charged by friction or conduction. Electrons are negatively charged and move from object to object, leading to one becoming positively charged and the other negatively charged.

Which has more weight electron or proton?

A proton is heavier than an electron.

MASS(kg):

Proton - 1.67 × 10-27kg

Neutron - 1.67 × 10-27kg

Electron - 9.11 × 10-31 kg

*A neutron is about .1% heavier than a proton.

How many neutrons does iron 60 have?

The atomic number of an isotope is the same as the element - so Iron-59 would have an atomic number the same as Iron - or 26.

Iron-59 specifically is

a radioisotope of iron having a half-life of 45 days; used in ferrokinetics tests to determine the rate at which iron is cleared from the plasma and incorporated in red cells. Symbol 59Fe.

What are two questions physicists have regarding antimatter?

1. Why is there more matter than antimatter in the Universe? Or: Why is there matter at all? (If there were the same amount of matter and antimatter, and it came into contact, it would quickly get destroyed.

2. If antimatter is so abundant, how come we've never come in contact with it or have been able to observe it?

What is a subatomic structure?

A subatomic structure refers to the smaller particles that make up an atom. These include protons, neutrons, and electrons. Subatomic structures play a crucial role in determining the properties and behavior of atoms.

What are the main three parts of an electrons used in the current atomic theory that describe an electrons location?

An electron configuration shows the distribution of electrons among the subshells. Each number shows the principal quantum number, or shell, the subshell and finally the orbital of the electron.

Where are electrons located in the structure of an atom?

Electrons move in a random manner around the nucleus. hence do not follow a fixed path. Yet electrons do have a fixed energy level due to which the probable path traced by them is predictable. Over all, electrons are found in the form of clouds.

How many neutrons are in magnesium 25?

25 is the number of protons and neutrons added together. The atomic number of Mg is 12 which is the number of protons. So 25 - 12 = 13 neutrons.

What does the nuecleous do?

The nucleus is the control center of the cell, storing genetic material in the form of DNA. It regulates gene expression, protects the DNA, and coordinates cellular activities like growth, metabolism, and reproduction.

In an atom of antimatter what would be the charge of an electron?

An atom of antimatter does not contain any electrons. The equivalent of an electron in antimatter is a positron, which has charge +1.

What is the path of a subatomic particle called?

Usually, the path that a subatomic particle takes is called just that, its path. Certain terms are used for specific circumstances, though, such as; orbit, when you're talking about atomic electrons; track, when you're referring to a particle's path in a cloud or bubble chamber; and beam, when referring to the path of a group of similar particles in an accelerator.

What happens to the energy that is given up by electrons as they move through the electron transport chain?

The energy given up by electrons as they move through the electron transport chain is used to actively transport protons across the inner mitochondrial membrane, creating an electrochemical gradient. This gradient is then used by ATP synthase to generate ATP through a process called chemiosmosis.

What subatomic particles is used to classify the properties of an element?

Protons, neutrons, and electrons are the subatomic particles used to classify the properties of an element. The number of protons determines the element's atomic number and defines its chemical properties. Neutrons help determine the stability of an atom, while electrons influence its reactivity and bonding behavior.

What is an annihilation reaction?

Annihilation reaction is when you take matter and anti-matter and try to put them together and they cancel each other out. Try putting an electron and a positron together. What happens? They will cancel each other out.