protons and neutrons mass

It is the central core of the atom where the entire +ve charge and mass is concentrated. It is a tiny sphere of diameter ranging from 10 - 1 5 m to 10 - 1 4 m. A nucleus is made up of particles called neutrons and protons. A neutron does not carry any..

Question: The mass of the atom is determined by________. 1. neutrons 2. neutron and proton 3. electron 4. electron and neutron Answer: ..

Represent the atom of sodium whose atomic mass is 23 and atomic number is 11. Calculate the number of protons, electrons and neutrons..

. It is abbreviated Z. Mass number is defined as the sum of the number of protons and neutrons in the nucleus of the atom. It is denoted by 'A'. Atoms of the same element having same atomic number but different mass numbers are called isotopes. Isotopes show ..

These are the elements having same atomic number but different mass number. They have the same atomic number because the number of protons inside their nuclei remains the same. The difference in their mass number is due to the difference in their number of neutro..

Rutherford and his co-workers, performed series of scattering experiments and concluded that the entire mass and the positive charge is concentrated in a very small region at the centre of the atom, known as nucleus. The radius of the nucleus is about 10 - 1 5 m i.e., 10 - 5 times that of..

It is important to know the atomic picture of matter. The basic unit of all matter is an 'atom'. Each atom consists of a small core called nucleus which accounts to most of its mass consisting of positively charged protons and neutral neutrons and surrounded by lighter..

Question: Almost the entire mass of an atom is concentrated in the__________. 1. proton 2. electrons 3. nucleus 4. neutrons Answer: ..

In view of new discoveries about atoms, Dalton's atomic theory was modified as given below: Atom is no longer indivisible as it has a complex structure of sub atomic particles (electrons, protons and neutrons). Atoms of the same element may posses different relative massesh..

Since the positive protons in the nucleus repel each other, neutrons are required to bind the nucleus together. For lighter elements, the number of protons and neutrons are approximately equal. As the number of protons increases the force required ..