Statement - I: Along the period, the chemical reactivity of the element gradually increases from group 1 to group 18.Statement - II: The nature of oxides formed by group 1 element is basic while that of group 17 elements is acidic.
Question
Statement - I: Along the period, the chemical reactivity of the element gradually increases from group 1 to group 18.Statement - II: The nature of oxides formed by group 1 element is basic while that of group 17 elements is acidic.
Solution
Statement I: This statement is partially correct. As we move from left to right across a period in the periodic table, the reactivity of elements does not gradually increase. Instead, it varies. For example, alkali metals (group 1 elements) are highly reactive, but noble gases (group 18 elements) are largely unreactive. This is due to the increase in nuclear charge which attracts the electrons in the outer shell closer to the nucleus, making it harder for the atom to lose an electron and thus decreasing its reactivity.
Statement II: This statement is correct. Group 1 elements, the alkali metals, form basic oxides. This is because these metals readily lose their outermost electron to form a positive ion, or cation. When these cations react with oxygen, they form oxides that are basic in nature. On the other hand, Group 17 elements, the halogens, form acidic oxides. This is because these non-metals gain electrons to form negative ions, or anions. When these anions react with oxygen, they form oxides that are acidic in nature.
Similar Questions
The order of the elements in Group 1 is: lithium, sodium, potassium, rubidium and caesium.Knowing the trend in the reactivity of Group 1 elements, predict which element you would expect to react with oxygen the most.RubidiumPotassiumSodiumLithiumCaesium
13. Group 1 elements are called ________________________ and will react with Group 17 elements, which are called __________________ to create _____________.14. Metalloids are used for ______________________.15. Metals are typically found in Groups _____ to _____ on the Periodic Table.16. The lower block transition elements are called the ________________ and the ___________________.Chapter 11 Review Questions1.An outermost electron of an atom that participates in chemical bonding. _____________________________2. The attraction between positively and negatively charged ions in an ionic compound. ________________________3. A group of atoms held together by covalent bonding that acts as an independent unit. _________________________4. A molecule that has a partial positive and a partial negative end because of unequal sharing of electrons. ___________________5. Electrons closest to the nucleus have the ____________ energy.6. The number of paired dots in the electron dot diagram tell you ___________________________________.7. Elements form bonds to __________________________________.8. Covalent bonding occurs between _____________________________.9. Ionic bonding occurs between __________________________________.10. Elements with _____ valence electrons are the most stable.11. The most stable element is Group 18, or the __________________________.
Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right? ans. The elements become less metallic The atoms lose their electrons more easily There is an increase in the number of valence electrons The oxides become more acidic
Elements in group 17 are highly reactive and are referred to as _______.alkali metalstransition metalshalogensnoble gases
An element with atomic no. __________ will form an acidic oxide
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