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As you go along the groups, you add one proton and one electron.
The more protons you add, the higher the positive charge in the nucleus gets.
Similarly, the more electrons you add, the more negative the shell of electrons gets.

With rising opposing charges in the nucleus and in the electrons, the electrons become more and more attracted to the nucleus, making the atom get smaller and more "tightly packed" in a way. Since the electrons are more attracted to the nucleus, it gets harder and harder to pull one of them away. So 1st ionization energy would increase as you go down a group.

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14y ago
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8y ago

The ionization energy decrease down in a group and increase from left to right in a period.

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Q: How does first ionization energy change going down an across the periodic table?
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Related questions

How does the first ionization energy change going down and across the periodic table?

In a group the first ionization energy decrease going down.In a period the first ionization energy increase from left to right.


What trend it does the first ionization energy follow going across the periodic table?

The ionization energy increases going across a periodic table.This is because of increasing nuclear charge.


What is ionization energy of boron?

Across a row on the periodic table ionization energy increases. Down a column, ionization energy decreases. --------------------------------------------------------- The first Ionization energy of Boron is 800.6 kJ mol-1


Moving across a period on the periodic table from left to right?

ionization energy


Is it ionization energy is a periodic property?

Ionization energy generally increases across a period as a result of a higher nuclear charge, however there are some exceptions such as Boron which has a lower ionization energy than Beryllium (because it is in a P orbital), and Oxygen which has a lower ionization energy than nitrogen (Because ionization decreases the electron electron repulsion in its orbitals).


Describe the trends in first ionization energy within groups and across periods in the periodic table Provide examples?

When moving left to right across the PT the ionization energy increases. As you go down, the ionization energy, decreases.


How does Ionization Energy behave along the Periodic Table?

Ionization energy increases as we go across a period. Its value decreases as we go down a group.


What trend does the ionization energy follow going across the periodic table?

The correct answer is: The ionization energy increases because there are more protons to pull on the electrons.


What is the general trend of ionization energy as you go across the periodic table?

Across a period, first ionization energy increases. However, when going down a group, first ionization energy generally decreases. As you go down a group, atoms hove more total electrons so they don't really care that much about their outermost ones.


What trends does the first ionization energy follow going across the periodic table?

The correct answer is: The ionization energy increases because there are more protons to pull on the electrons.


From left to right across the second period of the periodic table?

First ionization energy increase


What increases as you move right across a period in the periodic table?

Atomic number, ionization energy and electronegativity