The subatomic particle that has the least mass is the

The electron mass has the smallest mass between the basic particles inside the atoms

Inside the atom consists of a nucleus containing 3 basic particles namely protons and neutrons, while electrons move around the nucleus.

The charge of 1 proton is equal to a charge of 1 electron, but the sign is different.

The proton is positively charged (+1), the electron is negatively charged (-1). and neutrons not charged (neutral)

For a charge of 1 electron = e = 1.66.10⁻¹⁹ coulomb

Whereas the neutron charge = 0

The mass number is not the same as the atomic mass. The mass number is the number of protons and neutrons in one atom. While the atomic mass is a number that expresses the mass of one atom.

Atomic mass is expressed in special units, namely atomic mass unit because the atomic mass is very small if expressed in units of grams or milligrams

This atomic unit uses the standard atomic mass, that is, the C-12 isotope

1 atom C-12 = 12 atomic mass unit

1 atomic mass unit = 1/12 x mass 1 atom C-12

The mass of 1 proton is equal to the mass of 1 neutron, equal to 1 atomic mass unit and electrons have a mass smaller than both.

The proton mass is considered to be equal to 1 atomic mass unit and a neutron which has a slightly larger mass is also considered to be equal to 1 atomic mass unit

1 unit of atomic mass = 1.6726.10⁻²⁴

So the electron mass has the smallest mass between the basic particles inside the atoms

The electrons themselves were first discovered by JJ Thompson through experiments with vacuum tubes, while the electron charge was discovered by Robert Milikan.

Proton discovered Goldstein through a cathode  ray experiment and Neutron by James Chadwick

subatomic particles in an atom

the three particles of an atom

neutrons

the mass, charge, and location of protons, neutrons, and electrons in atoms

Keywords: protons, neutrons, electrons, subatomic particles, isotope, coulomb

The subatomic particle that has the least mass is

Further Explanation:

The smallest particle that is the building block of matter is known as an atom. Most of the space in an atom is empty and its mass is concentrated inside a small region called the nucleus.

Protons, electrons, and neutrons are the three subatomic particles that are present in the atom. Protons and neutrons are collectively called nucleons because these are located in the nucleus of the atom. Electrons revolve around the nucleus in definite orbits.  

The positively charged subatomic particle is called proton. It is equal to the atomic number of the element.  

Electron is the negatively charged subatomic particle. In a neutral atom, the number of electrons is equal to the number of protons present in the nucleus of an atom.  

The subatomic particle that has no charge is called neutron. It is situated within the nucleus. The number of neutrons present in the nucleus of an atom is called the neutron number. Atomic mass or mass number is the total number of nucleons within the atomic nucleus. So if the atomic number or the proton number is known, the number of neutrons can be calculated by the difference of mass number and atomic number.

The mass of the proton is . The mass of electron is approximately 1/1836 of the mass of the proton. So the mass of electron is . But the mass of neutron is  which is nearly equal to that of a proton. So electrons have the least mass among all the subatomic particles.

Learn more:

1. The name of the hydrocarbon:

2. Best kind of cleaning agent for burned-on grease:

Answer details:

Grade: High School  

Subject: Chemistry  

Chapter: Structure of the atom

Keywords: subatomic particle, proton, electron, neutron, mass, positively charged, neutral, negatively charged, atomic number, mass number, no charge, building block, matter, atom, nucleus.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be