Structure of Atom

Orbital angular momentum =nh/2π

=3h/2π (Qn=3)

Power of bulb = 662 watt = 662 Js^-1

Energy of one photon $=\frac{6.62*{10}^{-34}*3*{10}^8}{300*{10}^{-9}}$ $\frac{{}^{}{}^{}}{{}^{}}$

$=6.62*{10}^{-19}J$

Number of photons emitted $=\frac{662}{6.62*{10}^{-19}}$ $\frac{}{{}^{}}$

$={10}^{21}{s}^{-1}$

For a multi electron system, the energy of orbitals increase with increase in (n + l) value.

For same n + l value, the orbital with higher value of n has higher energy.

Orbital angular momentum = $\frac{nh}{2\pi }$ $\frac{}{}$

= $\frac{3h}{2\pi }\left(?n=3\right)$

Yes, one can see the atoms, but not with the naked eye. One needs to use specialised microscopes to see the atoms. To see the atoms, one can use electron microscopes such as electron ptychography and TEM, or they can also use Scanning Tunneling Microscope (STM).

Helium (He) is the smallest atom. It has a smaller physical size as the protons in Helium create a stronger nuclear charge to pull its electrons closer to nucleus. The hydrogen is the lightest element.

In molecules, atoms are held together by the chemical bonds, that are strong attractive forces. The main two types of chemical bonds include ionic bond and covalent bond.

The following are the steps one must follow to draw the structure of an atom: First, find out the atomic number of the element on the periodic table, then draw a small central circle called the nucleus that includes the protons and neutrons. Next, there will be concentric circles around the nucleus for electron shells. Next, fill these shells with dots or crosses for electrons. One can fill around a maximum of 2 electrons in the first shell and a maximum of 8 in the second shell, and so on.