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The trend for ionization energy is:

left to right across a period, it increases;

top to bottom down a group, it decreases.

It has to do with the amount of attraction the positively charged nucleus has on the number of electrons in the outer energy level and the distance between them.

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Q: What is a general rule you can use for the ionization energy trend on the periodic table?
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Related questions

What is ionization energy and how does it relate to the periodic table?

The ionization energy is the energy needed to extract an electron from an atom.The value of the ionization energy increase from left to right in a period of the periodic table and decrease in a group from the above to down.


What element has the highest ionization energy in group 4 of the periodic table?

the nobles gases are the greatest ionization group


Which elements on periodic table have the highest ionization energies?

Helium (He) has the highest ionization energy.


What accounts for the general trend in the first ionuization energy of the elements within a period?

As you go from right to left in a period in the periodic table the ionization energy increases. While going from top to bottom in a group in the periodic table the ionization energy decreases .


What periodic treds exist for ionization energy?

Ionization energy increases to the right and up on the periodic table. Ionization energy is the energy required to remove an electron. It can be conceptualized as the opposite of electron affinity, though this is not precisely true.


What features are in the periodic table?

Atomic Number Number of Protons and Electrons (Atomic Number) Atomic Mass General electronegativity, radius, and ionization energy based on the position of an element on the Periodic Table.


What are the general properties of the elements in the group on the right side of the periodic table?

The elements present at right side groups of the periodic table are non-metals. They have high electron affinity and ionization energy.


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


Where on the most reactive metals on the periodic table?

the bottom of the Periodic Table. why? a metal looses electrons and at the bottom of the periodic table is the lowest amount of ionization energy (the energy needed to remove electrons) with low ionization energy, not much energy is needed to remove those electrons making it faster and easier to do so.


What are trends in ionzation energy?

from left to right in a row on the periodic table the ionization energy increases. going down a column the ionization energy decreases.


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

ionization energy


What type of elements tend to have low ionization energies?

The elements in the lower right part of the Periodic Table. Cs, Fr, Ra, Ba etc.