Art, asked by ds3499219, 4 months ago

kisa par lagaya gaya
नये kaanun ma किसकी जीत hogi
a. सरकार

b. kisan ​

Answers

Answered by Anonymous
6

Answer:

The mass number is given at the top left of the elements symbol, for example, sodium has a mass number of 23. We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.

Answered by Anonymous
5

Answer:

The cell nucleus was discovered by Antonie van Leeuwenhoek in the 18th century. He first observed its structure in a sample of salmon blood. ... Nucleus – Structure and Function.

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