The luminosity of the Sun is 4 x 1026 W, which means that the sun emits 4 x 1026 J of energy every second. How much mass does it change into energy every second? Express your answer in kilograms. In fusion reactions, only a small fraction of the hydrogen mass is converted into energy. 99.3% of the hydrogen is converted into helium, and just 0.7% of the hydrogen is converted into energy. Based on this information, how much hydrogen undergoes fusion in the Sun every second? Express your answer in kilograms.

Solution :

The sun emits = J of energy per second

                        =

We know,

,   where C =

Dividing both sides by 1 second

Then,

Now according to the information, 99.3% hydrogen.

If 0.7 % of hydrogen produce = J of energy per second

Then 1% of hydrogen will produce =   J energy per second

So, 100% of hydrogen will produce =  J energy per second

                                                          =  J energy per second

Mass of hydrogen undergo fusion in sun per second

Similarly,

  kg

kg

indium, and thallium have three electrons i think

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8