Some examples from this set of practice questions
1.
what is modern periodic law?
Answer: The chemical and physical properties of the elements are the periodic functions of their atomic numbers.
2.
What is screening effect or shielding effect?
Answer: The decrease in force of attraction on valence electrons due to inner shell electrons is called screening or shielding effect.
3.
What is atomic radius?
Answer: Distance from the center of the nucleus to outermost shell.
4.
What is ionization enthalpy?
Answer: Amount of energy required to remove the most loosely bound electron from isolated gaseous atom in the ground state.
5.
What is electron gain enthalpy ?
Answer: The enthalpy change taking place when an isolated gaseous atom of the element accepts an electrons to form a monovalent gaseous anion.
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