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Valency,Ions
Valency,Ions
Let's explore how valency changes in different groups when elements combine with oxygen
Group 1 (Alkali Metals):
Elements in Group 1, such as lithium (Li), sodium (Na), and potassium (K), typically lose one electron when combining with oxygen to achieve a stable electron configuration. This results in a valency of 1 for compounds like lithium oxide (Li2O) or sodium oxide (Na2O).
Group 2 (Alkaline Earth Metals):
Elements in Group 2, such as beryllium (Be), magnesium (Mg), and calcium (Ca), generally lose two electrons when combining with oxygen. This leads to a valency of 2 for compounds like beryllium oxide (BeO) or magnesium oxide (MgO).
Groups 13 to 18:
Elements in Groups 13 to 18 may exhibit variable valency when combining with oxygen. The valency is often related to the number of electrons needed to achieve a stable electron configuration.
For example, carbon (Group 14) may share electrons to achieve a valency of 4 in compounds like carbon dioxide (CO2), while nitrogen (Group 15) may share or gain electrons to achieve a valency of 3 or 5 in compounds like nitrogen dioxide (NO2) or nitrogen pentoxide (N2O5).
Group 17 (Halogens):
Elements in Group 17, such as fluorine (F), chlorine (Cl), bromine (Br), and iodine (I), typically gain one electron when combining with oxygen. This results in a valency of 1 for compounds like chlorine oxide (Cl2O) or bromine oxide (Br2O). -
Valency,Ions
Valency,Ions
Let's explore how the valency changes in different groups when elements combine with chlorine
Group 1 (Alkali Metals):
Elements in Group 1, such as lithium (Li), sodium (Na), and potassium (K), typically lose one electron when combining with chlorine to achieve a stable electron configuration. This results in a valency of 1 for compounds like lithium chloride (LiCl) or sodium chloride (NaCl).
Group 2 (Alkaline Earth Metals):
Elements in Group 2, such as beryllium (Be), magnesium (Mg), and calcium (Ca), generally lose two electrons when combining with chlorine. This leads to a valency of 2 for compounds like beryllium chloride (BeCl2) or magnesium chloride (MgCl2).
Groups 13 to 18:
Elements in Groups 13 to 18 may exhibit variable valency when combining with chlorine, but often, the valency is related to the number of electrons needed to achieve stability.
For example, carbon (Group 14) may share electrons to achieve a valency of 4 in compounds like carbon tetrachloride (CCl4), while nitrogen (Group 15) may share or gain electrons to achieve a valency of 3 or 5 in compounds like nitrogen trichloride (NCl3) or nitrogen pentachloride (NCl5).
Group 17 (Halogens):
Chlorine (Cl) itself has a valency of 1 when combining with other elements, as it gains one electron to achieve stability.
Other halogens in Group 17, such as fluorine (F), bromine (Br), and iodine (I), typically have a valency of 1 when combining with elements like hydrogen or metals.
