4. It is difficult for a proton to approach the nucleus of an atom because of __

ID: 1495211 • Letter: 4

Question

4. It is difficult for a proton to approach the nucleus of an atom because of ___

A) the gravitational field

B) the magnetic field

C) the electrostatic field

D) the nuclear force

5. If nucleus A has more nucleons than nucleus B, then A must have ___

A) a greater mass number than B

B) a greater atomic number than B

C) a greater number of protons than B

D) a greater number of neutrons than B

6. What is the relationship between the atomic number Z, the mass number A, and the number of neutrons N in a nucleus?

A) N = A + Z

B) A = N Z

C) Z = A - N

D) N = Z - A

4. nucleous is made of protons.

so these nucleaon protons will strongly repel any proton so it is difficult due to electrostatic force.

Ans (C)

5. nucleaons = number of protons + neutrons

that is also equal to mass number.

so more nucleons means greater mass number.

Ans( A)

6. Mass number = no, of protons + no of neutrons

and in an atom: no of proton = no. of electrons = atomic number

hence

A = Z + N

Z = A - N

Ans(C)

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