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# What happens to the radius of an atom as one goes down a group?

Updated: 8/11/2023

Raven87

Lvl 1
14y ago

The radius will increase, this is because as you go down there are more electrons and they are put into progressivly larger orbitals so in effect the raidus increases.

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14y ago

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Q: What happens to the radius of an atom as one goes down a group?
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### Explain the large decrease in atomic radii as you move across a period from group 1 to group 14?

Atomic radius increases down the group due to increase in no.of orbits around the nucleus.

### When you go left to right on the periodic table what happens to the atomic radius?

Yes. The atomic radius increases down the group. This is because number of shells increases down the group.

### What trend is seen atom size going down the periodic table?

Excepting groups 5-12 of the periodic table.the atomic radius increase down in the group.

### In general the atomic radius of an atom as you move down a column in the periodic table?

Decreases. Look at the images under atomic radius, on wikipedia.

### What happens to atomic radius as you move from bottom to top of the periodic table?

atomic radius decreases from bottom to top of the periodic table.

### What happens to the group 1 elements as you go down the table?

As you go down group 1, the atomic number and atomic mass increase. Electronegtivity decreases and atomic radius increases.

### What do you notice about atomic radius as you look down a group?

As you look down a group you notice that the atomic radius increases or becomes larger.

### Why does the size of the elements increase down a group?

The atomic numbers of the elements down a group increase. this means, more electrons. More electrons mean more shells. More shells mean larger radius. Larger radius is nothing but larger size. Thus, the number of electrons or shells is the reason why the size of the atom of elements increase down the group.

### What happens to the atomic radius as you go opwn the column?

Atomic radius (or size) increases as you move down a group from top to bottom. This is because with each spot you move down, you go up a period, which means you add an energy level to the atom. This translates to electrons being farther and farther from the nucleus (which also lowers electronegativity and ionization energy.)

### Why does the radius of an atom increase when an atomic number increases?

This happens only down a group. Let us consider Lithium and sodium which belong to the same group, Group 1. In a Lithium atom which has 3 electrons, the last electron enters the 2s orbital or the L-shell. The next element of the same group, Sodium, has 11 electrons. the last electron enters the 3s orbital or the M-shell. It is now clear that as you move down the group, a new shell gets added which means the atom is getting bigger. And this is because the atomic number increases down the group which is why Lithium (at. no. 3) is before Sodium (at. no. 11). This trend is observed in every group.

### What happens to the melting point of the alkali metals as the atom increase in size?

As we move down the group, the melting point decreases.

### What is the Group trend Atomic radius?

Atomic radius increases down the group. This is because of the increase in number of shells.