(a)
Interpretation: The number of protons and electrons in the given ion needs to be determined.
Concept Introduction: Metals are electropositive and they tend to form cations by losing electrons. On the other hand, non-metals are electronegative and tend to accept electrons. Thus they form anions.
(a)
Answer to Problem 126A
The most stable ionic form of magnesium is
Explanation of Solution
The most stable ion of magnesium
(b)
Interpretation: The number of protons and electrons in the given ion needs to be determined.
Concept Introduction: Metals are electropositive and they tend to form cations by losing electrons. On the other hand, non-metals are electronegative and tend to accept electrons. Thus they form anions.
(b)
Answer to Problem 126A
Bromide ion is a monovalent ion. It has 35 protons and 36 electrons.
Explanation of Solution
A bromide ion is formed when a bromine atom accepts one electron. A bromine atom with atomic number 35 contains 35 electrons and 35 protons. The addition of one more electron makes a bromide ion, with 35 protons and 36 electrons.
(c)
Interpretation: The number of protons and electrons in the given ion needs to be determined.
Concept Introduction: Metals are electropositive and they tend to form cations by losing electrons. On the other hand, non-metals are electronegative and tend to accept electrons. Thus they form anions.
(c)
Answer to Problem 126A
Strontium belongs to alkaline earth metals and forms
Explanation of Solution
Strontium ions are formed when a strontium atom with 38 protons and 38 electrons loses two electrons. Thus
(d)
Interpretation: The number of protons and electrons in the given ion needs to be determined.
Concept Introduction: Metals are electropositive and they tend to form cations by losing electrons. On the other hand, non-metals are electronegative and tend to accept electrons. Thus they form anions.
(d)
Answer to Problem 126A
Sulphur is a non-metal which tends to form divalent ions. Sulphide ions contain 16 protons and 18 electrons.
Explanation of Solution
Sulphur has an atomic number of 16 and it contains 16 protons and 16 electrons. When two more electrons are added to the sulphur atom, we get a sulphide ion
Chapter 9 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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