Question

The atomic number and mass number of 18 and 40. Write the information conveyed by this statement

Answer 1

Answer:

The atomic number and mass number of sodium are 11and23 respectively. This means that the sodium has 11 protons in its nucleus and also has 11 electrons in the aton to balance the total charge of the atom and keep it neutral . The mass no. means the relative mass of sodium compared with 1/12 the mass of a carbon C-12 isotope . It means it is 23 times heavier than 1/12 th the mass of one C-12 isotope of carbon. Also it says that one atom of sodium has ( 23 - 11 ) = 12 no. of neutrons in its nucleus.

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Explanation:

Answer 2

Answer:

organ has atomic number of 18 and Calcium as the atomic mass of 40 organ has 18 electrons and 18 neutrons and Calcium has 20 electrons and 20 neutrons