Orbital is the space around the nucleus, where there is a high probability of finding electrons.
There are 4 types of orbitals: s, p, d, f.
Here is the illustration diagram of s-orbitals.
Reference Source:
[1] Najam Academy. “The Shapes of Atomic Orbitals S-Orbital, P-Orbital and D-Orbital | #AtomicOrbitals.” YouTube, 15 Mar. 2021, www.youtube.com/watch?v=nNkw_0c8vY0&t=148s. Accessed 22 Sept. 2021.
[2] “Orbital | Chemistry and Physics | Britannica.” Encyclopædia Britannica, 2021, www.britannica.com/science/s-orbital. Accessed 22 Sept. 2021.
Also, read this book, The Gallery of Quantum Mechanics, Available here: https://payhip.com/b/0hAxy