<h2>
Answer:p=82,e=82,n=125.</h2>
Explanation:
Let 
be the number of protons.
Let 
be the number of electrons.
Let 
be the number of neutrons.
Atomic number is defined as the number of protons in a atom or ion.
Given,atomic number is 
.
So,
Since the atom is electrically neutral,number of protons and electrons are equal.
So,
The atomic mass is the sum of neutrons and protons.
Answer:
<h2>sorry sorry sorry sorry sorry sorry sorry</h2>
Answer : (C) "Higher frequencies have larger spaces between lines".
Explanation:
In Young's experiment, the condition for constructive interference is given by :
.........(1)
n is order or number of lines observed
d is distance between slits
is the angle between the path and the line from screen to the slits.
We also know that, 
or
where,
c is the speed of light
is frequency
is wavelength
So, equation (1) turns into
So,
or
Higher frequencies have larger spaces between line.
So, correct option is (C).
