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As you move down any group on the Periodic Table, atomic radius increases (due to extra energy levels of electrons, which expand the atom's volume.) Electrons that are farther away from the nucleus are easier to remove, due to gradually weaker Coulombic forces moving down the group. So, ionization energy decreases with each increment downward. This explains, for example, why cesium (Cs) is more reactive than sodium (Na).
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoBecause down in the group the atomic radius is higher and the attraction between nucleus and electrons is lower.
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What trend in electronegativity do you see as you go down a group-family on the periodic table?
Electronegativity decrease down in a group.
Does the first ionization energy increase or decrease when you go down a group?
it increases
Does nonmetal activity tend to decrease or increase as one goes down group 17?
It's decrease because florine has the most activity.
Does an element on the periodic table decrease in atomic size when you move across a period from left to right and when you move down a group?
1. In a period is a trend of decrease from left to right but it is not absolute.2. In a group the atomic radius increase moving down.
Why melting point decrease down the group for Alkali metals but increase for Halogens?
Because the atomic radius increases down the group 1 and decreases down the group of halogen
What trend in electronegativity do you see as you go down a group-family on the periodic table?
Electronegativity decrease down in a group.
In ionization energy how does the property varies within a group?
The ionization energy decrease moving down in a group.
Does the first ionization energy increase or decrease when you go down a group?
it increases
Does nonmetal activity tend to decrease or increase as one goes down group 17?
It's decrease because florine has the most activity.
Does elements on the periodic table decrease in atomic size when you move across a period from left to right and when you move down a group?
1. In a period is a trend of decrease from left to right but it is not absolute.2. In a group the atomic radius increase moving down.
Does an element on the periodic table decrease in atomic size when you move across a period from left to right and when you move down a group?
1. In a period is a trend of decrease from left to right but it is not absolute.2. In a group the atomic radius increase moving down.
What is electron affinity . write down its trend in periods and group?
The electronegativity increase in a period from left to right; in a group decrease by descending.
What must become weaker for the melting point to decrease down the group?
The bonds between the electrons
What is group trend of boiling point in IA group?
The boiling point decrease from lithium to caesium.
Why melting point decrease down the group for Alkali metals but increase for Halogens?
Because the atomic radius increases down the group 1 and decreases down the group of halogen
What is the group trend in the first ionization energies and why?
1. The ionization energy decrease down in the group.2. The cause is that the distance between the nucleus and the electron shell increase and the needed energy to extract an electron decrease.
Why the solubility of alkaline earth metals decrease down the group?
because down the group the cation becomes gets larger so the hydration energy decreases. so the solubility decreases
