Question

1.Which molecule show trigonal bipyramidal geometry ?
2.Other name of Eka silicon.
3.How many elements are present in the 1st period of the
periodic table ?
4.What is de-broglie equation ?
5.What is atomic number?
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Answer 1

1. PCl5 (Phosphorous PentaChloride)

2. Germanium

3. 2 ( Hydrogen And Helium)

4. λ = h/mv (where λ is wavelength, h is Planck's constant, m is the mass of a particle, moving at a velocity v.)

5. The number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.

Thank You!!!