Question

The energy of an electron in the third orbit of an atom is -E. the energy of an electron in the first orbit will be

a) -3E
b) -E/3
c) -E/9
d) -9E

Answer 1

Answer:

Now factor of 10 is = 5 × 2

Now to break the base number into 5 or 2

So, for 25 = 25

33 = 33

48 = (2 × 2)8 = 216

53 = 53

67 = (2 × 3)7 = 27 × 37

76 = 76

812 = (2 × 2 × 2)12 = 236

99 = 96

106 = (2 × 5)6 = 26 × 56

1512 = (5 × 3)12 = 512 × 312

2014 = (5 × 2 × 2)14 = 514 × 228

2211 = (11 × 2)11 = 1111 × 211

2515 = (5 × 5)15 = 530

So total = 2109 × 565

We can ignore rest of the factors

⇒ 1065 × 244

So, power of 10 is 65

⇒ n = 65

Answer 2

Answer:

d is correct answer I think