Respuesta :
Al will have the lowest IE₃ as its third electron will be in the highest energy level and more loosely bonded to the nucleus.
What is nucleus?
- On the basis of the 1909 Geiger-Marsden gold foil experiment, Ernest Rutherford identified the atomic nucleus in 1911, which is the compact, dense region made up of protons and neutrons at the heart of an atom.
- Dmitri Ivanenko and Werner Heisenberg immediately created models for a nucleus made of protons and neutrons after the neutron was discovered in 1932.
- A positively charged nucleus and a cloud of negatively charged electrons that are held together by electrostatic force make up an atom.
- The electron cloud contributes very little to the atom's mass, which is almost entirely in the nucleus. The nuclear force brings protons and neutrons together to create a nucleus.
To learn more about nucleus with the given link
https://brainly.com/question/23366064
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