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प्रश्न
First ionisation enthalpy of two elements X and Y are 500 kJ mol−1 and 375 kJ mol−1 respectively. Comment about their relative position in a group as well as in a period.
उत्तर
Ionisation Enthalpy or potential is highest on the right side of the periodic table and lowest on the left side. Elements X and Y seem to be metals, which are on the left side of the table. Group I metals lose one electron each. Ionisation Enthalpy decreases in groups from top to bottom. In the IA group, X represents Sodium (Na) and Y represents Caesium (Cs). Also, X is in the third period and Y is in the sixth.
संबंधित प्रश्न
A process of formation of ions from molecules which are not in the ionic state
A, B, C are three elements in which B is an inert gas other than helium.With this information complete the following table.
| Element | Atomic number | No. of electrons in the valence shell | Group to which the element belongs |
| A | Z - 1 | ||
| B | Z | ||
| C | Z + 1 |
Also, explain the following : Ionization energy of element C is less than that of element A.
Arrange the following in increasing order of property indicated
Li, Be, B (ionization energy)
Fill in the blank from the choices given below
Across a period, the ionisation potential ____________.
Fill in the blank from the choice given in bracket.
The energy required to remove on electron from a natural isolated gaseous atom and convert it into a positively charged gaseous ion is called ____________
Arrange the following as per the instruction given in the bracket
Na,Li,K (Increasing ionization energy)
The changes in the properties of elements on moving from left to right across a period of the Periodic Table. For the property, choose the correct answer.
The ionization potential:
Identify the following:
The energy required to remove an electron from a neutral gaseous atom.
With reference to the variation of properties in the Periodic Table, which of the following is generally true?
Ionisation Potential values depend on atomic size. Explain.
