When light enters a lens, C) it is refracted.
Since it is bent when it enters a lens, it has to be refracted.
Explanation:
wavelength =200cm=2m
frequency is reciprocal of wavelength
f=1/2
f=0.5Hz or 1/s
They’re at a velocity of 2.0 m/s
To find the number of neutrons in an atom, what we must do is to follow the following steps:
1) Find the element in the periodic table.
2) Find the atomic number of the element. The atomic number is the number of protons of a single atom of that element.
3) Find the atomic weight of the element.
4) Finally, we look for the number of neutrons. For this, we follow the following relationship:
Atomic weight - number of protons = number of neutrons.
Answer:
To find the number of neutrons in an atom, you would subtract:
B.) atomic number from mass number
