Respuesta :
These are the absorption of energy by electrons.
What is electron?
The electrons are an atom's negatively charged building blocks. An atom's entire population of electrons comes together to create a negative charge that balances out the positive charge of the protons in the atomic nucleus. Electrons are incredibly little compared to all the other atom's parts.
What is atom ?
A negatively charged electron or electrons surround the core nucleus of an atom, which is made up of one or more of them. Protons and neutrons, which are comparatively heavy particles, are present in the positively charged nucleus in one or more quantities.
We call the shell is complete if they have 2 electrons ( in the first shell only) called duplet or 8 electrons ( in any shell except the first ) called octate.
1) In the first figure, the duplet is complete. ( 2 electrons in the first shell). But the second one has only 4 and octate is incomplete, still the third shell has one electron. So this is the excited state.
2) In second picture, first shell has only one electron and duplet is not complete. Still the second shell has two electrons. This is the excited state.
3) In third picture, first shell has completed duplet and second shell has completed the octate. But third shell is not completed. Still the forth shell has three electrons. So, this is also the excited state.
4) Forth picture has complete duplet and complete octate. Higher shells have no electrons. So, this is not excited state.
5) In fifth picture also, atom has completed duplet and octate. Higher orbit ( third ) has two electrons. Though, the octate is complete, higher shells have no electrons. So this is not a excited state.
Therefore, these are the absorption of energy by electrons.
Learn more about electron from the given link
https://brainly.com/question/13998346
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