Question

Complete the following:

Match each of the positive ions listed with the total number of electrons that ion contains. Us
your periodic table. The same answer may be used more than once.
E) 24
A) 2 B) 10 C) 21
Al 3
Li+¹
D) 23
Fe +3
Cr+3
F) 25 G) 36
Mg¹2
Rb+1
H) 48 1) 76 J) 81
Sn+²
—
Pt+²

Answer 1

To match each positive ion with the total number of electrons it contains, determine the ionic charge of each ion and subtract it from the number of protons. Finally, use the periodic table to find the atomic number and calculate the number of electrons.

Step-by-step explanation:

To match each positive ion with the total number of electrons it contains, we need to determine the ionic charge of each ion. The ionic charge is equal to the number of protons minus the number of electrons. On the periodic table, the number of protons is represented by the atomic number. For example, Al has an atomic number of 13, so it has 13 protons. Al3+ has a total charge of +3, indicating that it has lost 3 electrons to become positively charged. Therefore, Al3+ contains 10 electrons.

Using this method, we can determine the number of electrons for each ion:

1. Li+: 1 proton - 0 electrons = 1 electron
2. Mg2+: 12 protons - 2 electrons = 10 electrons
3. Fe+3: 26 protons - 3 electrons = 23 electrons
4. Cr+3: 24 protons - 3 electrons = 21 electrons
5. Rb+1: 37 protons - 1 electron = 36 electrons
6. Sn+2: 50 protons - 2 electrons = 48 electrons
7. Pt+2: 78 protons - 2 electrons = 76 electrons

Therefore, the matching ions with the total number of electrons are:

• E) Al3+: 10 electrons
• A) Li+: 1 electron
• B) Mg2+: 10 electrons
• C) Fe+3: 23 electrons
• D) Cr+3: 21 electrons
• F) Rb+1: 36 electrons
• G) Sn+2: 48 electrons
• J) Pt+2: 76 electrons

Learn more about Ionic charges and electron count