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Mobile App Chapter 2: Problem 74
For each of the following atomic numbers, use the periodic table to write the formula (including the charge) for the simple ion that the element is most likely to form in ionic compounds. a. 13 b. 34 c. 56 d. 7 e. 87 f. 35
Short Answer
Expert verified
a. \(Al^{3+}\)
b. \(Se^{2-}\)
c. \(Ba^{2+}\)
d. \(N^{3-}\)
e. \(Fr^{+}\)
f. \(Br^{-}\)
Step by step solution
01
Identify the element
The element with atomic number 13 is Aluminum (Al).
02
Determine group and electron tendency
Aluminum is in group 13 of the periodic table, which means it has 3 valence electrons. Elements in this group tend to lose 3 electrons to achieve a stable electron configuration.
03
Write ion formula and charge
Losing 3 electrons will give Aluminum a +3 charge. The formula for the ion Aluminum is most likely to form in ionic compounds is \(Al^{3+}\).
b. 34
04
Identify the element
The element with atomic number 34 is Selenium (Se).
05
Determine group and electron tendency
Selenium is in group 16 of the periodic table, which means it has 6 valence electrons. Elements in this group tend to gain 2 electrons to achieve a stable electron configuration.
06
Write ion formula and charge
Gaining 2 electrons will give Selenium a -2 charge. The formula for the ion Selenium is most likely to form in ionic compounds is \(Se^{2-}\).
c. 56
07
Identify the element
The element with atomic number 56 is Barium (Ba).
08
Determine group and electron tendency
Barium is in group 2 of the periodic table, which means it has 2 valence electrons. Elements in this group tend to lose 2 electrons to achieve a stable electron configuration.
09
Write ion formula and charge
Losing 2 electrons will give Barium a +2 charge. The formula for the ion Barium is most likely to form in ionic compounds is \(Ba^{2+}\).
d. 7
10
Identify the element
The element with atomic number 7 is Nitrogen (N).
11
Determine group and electron tendency
Nitrogen is in group 15 of the periodic table, which means it has 5 valence electrons. Elements in this group tend to gain 3 electrons to achieve a stable electron configuration.
12
Write ion formula and charge
Gaining 3 electrons will give Nitrogen a -3 charge. The formula for the ion Nitrogen is most likely to form in ionic compounds is \(N^{3-}\).
e. 87
13
Identify the element
The element with atomic number 87 is Francium (Fr).
14
Determine group and electron tendency
Francium is in group 1 of the periodic table, which means it has 1 valence electron. Elements in this group tend to lose 1 electron to achieve a stable electron configuration.
15
Write ion formula and charge
Losing 1 electron will give Francium a +1 charge. The formula for the ion Francium is most likely to form in ionic compounds is \(Fr^{+}\).
f. 35
16
Identify the element
The element with atomic number 35 is Bromine (Br).
17
Determine group and electron tendency
Bromine is in group 17 of the periodic table, which means it has 7 valence electrons. Elements in this group tend to gain 1 electron to achieve a stable electron configuration.
18
Write ion formula and charge
Gaining 1 electron will give Bromine a -1 charge. The formula for the ion Bromine is most likely to form in ionic compounds is \(Br^{-}\).
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