Answer:
it means you have 4 sodium
Explanation:
This is an incomplete question, here is a complete question.
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately
?
Find the force acting on the electron as it revolves in a circular orbit of radius
.
Answer : The force acting on electron is, 
Explanation :
Formula used :

where,
F = force acting on electrons
m = mass of electrons = 
v = speed of electron = 
r = radius of circular orbit = 
Now put all the given values in the above formula, we get:


Thus, the force acting on electron is, 
Answer:
Heating the CuSO4. 5H2O crystals causes then to loose the water of crystallisation that is the 5H2O part. It becomes anhydrous copper sulphate. Its colour changes to white from blue.
Answer:
An Advertisement for acne medication claims it can clear up acne in less than one week
Explanation: