Structure of Atom Test - 9

We know Planck's equation is

E = hν

where E is energy, h is Planck’s constant, and ν is frequency.

Put given values,

E = 6.626 × 10⁻³⁴ ×  3 × 10¹⁵=1.988×10−18J

The Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n ≥ 2 to n = 1 (where n is the principal quantum number), the lowest energy level of the electron.

The Lyman series lies in the ultraviolet, whereas the Paschen, Brackett, and Pfund series lie in the infrared.

The Balmer series or Balmer lines in atomic physics, is the designation of one of a set of six named series describing the spectral line emissions of the hydrogen atom. The Balmer series is calculated using the Balmer formula, an empirical equation discovered by Johann Balmer in 1885 Balmar series lies in visible region of Electromagnetic spectrum.

Atomic number of iron (Fe) = 26

So number of protons = 26

Number of protons = number of electrons

But To gain 3+ charge it should loose 3 electron. So number of electrons present = 26-3 = 23

Now atomic mass = 56 (Given).

Number of neutrons = atomic mass - number of protons = 56-26 = 30

atomic number O has atomic number = 8 so number of electrons in O₂ = 16

while in O⁺₂ there is one unit positive charge so no. of electron =15.

In a atom no. of protons = no. of electrons i.e. P = E while this is not true in case of ions.

So number of protons in given atom is 29.