Question

54 )Observe the below mentioned figure which represents an atom and
answer the below given questions.
Electron
Proton
(i). What is the mass number of the element given in the figure?
(ii). How many neutrons are present in the atom in the given figure?​

Answer 1

Answer:

(I)The mass number (represented by the letter A) is defined as the total number of protons and neutrons in an atom. Consider the table below, which shows data from the first six elements of the periodic table. Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus.

(II)However, a nucleus that contains too many neutrons will become unstable and ... Therefore, this particular atom of hydrogen will have a mass number of 3. ... Changing the number of neutrons present in an atom will, in turn, cause ... Figure 2.4.2: Three elemental symbolisms for a single isotope of nickel.

Explanation:

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