Question

please tell please tell​

Answer 1

Answer:

1. the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.
2. the total number of protons and neutrons in a nucleus
3. Electron, lightest stable subatomic particle known. It carries a negative charge of 1.602176634 × 10−19 coulomb, which is considered the basic unit of electric charge. The rest mass of the electron is 9.1093837015 × 10−31 kg, which is only 1/1,836the mass of a proton.

Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.

5. Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.

6.the curved path of a celestial object or spacecraft round a star, planet, or moon, especially a periodic elliptical revolution.

7. The nucleus is the information centre of the cell and is surrounded by a nuclear membrane in all eukaryotic... A cell normally contains only one nucleus.

8. .

a mark or character used as a conventional representation of an object, function, or process, e.g. the letter or letters standing for a chemical element or a character in musical notation.

Answer 2

Answer:

1. The number of protons present in the nucleus of an atom is called atomic number.
2. The total number of protons and neutrons are present in the nucleus of an atom is called mass number
3. Electrons are negatively charged. It can flow freely or bound to the nucleus of an atom.Its charge is 1.6×10^-19
4. Protons are positively charged