Why does atomic radius decrease across a period and increase down a group?
Why does atomic radius decrease across a period and increase down a group?
Atomic radius is the distance from the atom’s nucleus to the outer edge of the electron cloud. In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant. This results in a larger atomic radius.
Which property increases and then decreases across a period of the periodic table?
Electron affinity
What happens to the ionization energy as the atomic radius increases?
As the atomic radius decreases, it becomes harder to remove an electron that is closer to a more positively charged nucleus. They experience a weaker attraction to the positive charge of the nucleus. Ionization energy increases from left to right in a period and decreases from top to bottom in a group.
What is the correct order of ionisation energy?
-That is why the correct order of ionisation energy is C < O < N < F.
What is the correct order of electron affinity?
Therefore, the correct order of electron affinity is Cl > F > Br.
What is the ionization energy of CL?
The elements of the periodic table sorted by ionization energy
| Ionization Energy | Name chemical element | Symbol |
|---|---|---|
| 12,9676 | Chlorine | Cl |
| 13,5984 | Hydrogen | H |
| 13,6181 | Oxygen | O |
| 13,9996 | Krypton | Kr |
Do anions have lower ionization energy?
A negative ion is called an anion, and a positive ion is called a cation. Atoms with low ionization energy and low electron affinity (metals) tend to lose electrons and become positive ions. Atoms with high ionization energy and high electron affinity (nonmetals) tend to gain electrons and become negative ions.
What is the ground state of CL?
Chlorine atoms have 17 electrons and the shell structure is 2.8. 7. The ground state electron configuration of ground state gaseous neutral chlorine is [Ne].
What would be the atomic number and mass number of CL?
17
What is the relation between atomic number and mass number?
mass numberThe sum of the number of protons and the number of neutrons in an atom. atomic numberThe number of protons in an atom.