The number of protoms tells you what position of the element on the periodic table is
To being my discussion, I claim that a new atomic model should always build on an old one with the following reasons of mine. That is option B.
<h3>What is an atomic model?</h3>
An atomic model is a model that describes how the interior of an atom looks like. This first atomic model was developed by William Thomson.
To start my discussion, I claim that a new atomic model should always build on an old one with the following reasons of mine:
- The modern scientists exploited the ideas of the ancient scientists to arrive at a better atomic model.
- This method is proven the the works of Bohr in the Bohr atomic model which relied on quantum mechanics, built upon the Rutherford model to explain the orbits of electrons.
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Explanation:
To calculate the wavelength of light, we use Rydberg's Equation:
Where,
= Wavelength of radiation
= Rydberg's Constant = 
= Higher energy level
= Lower energy level
1) The wavelength of the n=4 to n=1.
Putting the values in above equation, we get:
The region of this electromagnetic transition will be in a ultraviolet region.
2) The wavelength of the n=4 to n=1.
Putting the values in above equation, we get:
The region of this electromagnetic transition will be in an infrared region.
Alpha particle is nucleus of a helium-4 atom, which is made of two protons and two neutrons.
Nuclear reaction: ²²²Rn → ²¹⁸Po + α (alpha particle).
Alpha decay is radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and transforms into an atom with an atomic number that is reduced by two and mass number that is reduced by four.
Neutral atoms of argon, atomic number 18, have the same number of electrons as each of the following items except: Ne
Ne
1s² 2s² 2p⁶
Ar, K(+), Ca(2+), Cl(-), S(2-)
1s² 2s² 2p⁶ 3s² 3p⁶
