How do you find the ionization energy of helium?

The He+ ion is just like a hydrogen atom with two units of charge in the nucleus. Since the hydrogenic energy levels depend upon the square of the nuclear charge, the energy of the remaining helium electron should be just 4X(’13. 6ev)=’54.

What is meant by ionization energy explain any four factors that effect on IE?

(1) Nuclear charge : More the nuclear charge more is the Ionization Energy. (2) Screening or shielding effect : More the screening effect, less is the Ionization Energy. (3) Penetration power of the orbitals : More the penetration power, more is the Ionization Energy.

Why does the atomic radius increase as the ionization energy decreases?

Moving left to right within a period or upward within a group, the first ionization energy generally 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.

What is the relationship between metallic property atomic size and ionization energy?

Therefore the closer the electron to the nuclear the higher the attraction force, and thus the higher the energy required to overcome this attraction and remove the electron. Therefore the smaller the radius the higher the ionization energy, and the bigger the radius the lower the energy need.

What are the periodic trends for atomic size?

Periodic Trend The atomic radius of atoms generally decreases from left to right across a period. There are some small exceptions, such as the oxygen radius being slightly greater than the nitrogen radius. Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level.

Which element has the smallest atomic radius calcium potassium scandium titanium?

Titanium is in atomic number 22 thus it has more nuclear charge that calcium,potassium and scandium therefore titanium has the smallest atomic radius.

In case of Cl atom, the outermost shell has 7 electrons. Cl atom is neutral. When an electron is added to it, it becomes Cl- atom. Hence Cl- is bigger than Cl atom.

Which has smaller size CL or CL negative Why?

In each case, the negative ion is much larger than the atom from which it was formed. Because the nucleus can’t hold the 18 electrons in the Cl- ion as tightly as the 17 electrons in the neutral atom, the negative ion is significantly larger than the atom from which it forms.

Which one has the largest size BR I CL?

iodine

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