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The first five ionization energies through of a period element have the following pattern:

The first five ionization energies (IE_1 through iE_5) of a Period 2 element have the following pattern: Make a reasonable guess about which element this is. Enter its chemical symbol below.

the first five ionization energies through of a period element have the following pattern:

Answer

There is a huge difference in ionization energy between IE4 and IE5.

This means lots of energy are required to remove the 5th electron.

So, after 4 electrons are removed, the element has acquired noble gas configuration,.

So, ether are 4 valence electrons in the element.

The element in period 2 with 4 valence electrons is Carbon

Answer: C

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