Question 1

Which of the following ions has the same electron configuration as a noble gas?

Accepted Answer

Na$$^+$$

Question 2

What is the abbreviated electron configuration for K$$^+$$?

Accepted Answer

$$[Ar]$$

Question 3

Given that aluminum (Al) loses electrons, what positive charge would you expect it to form?

Accepted Answer

3+

Question 4

Which of the following ions is isoelectronic with Ne?

Accepted Answer

F$$^-$$

Question 5

How many unpaired electrons does Rh$$^{3+}$$ have?

Accepted Answer

1

Question 6

Which of the following ions should be the largest in size?

Accepted Answer

Se$$^{2-}$$

Question 7

Which of the following atoms has the smallest atomic radius?

Accepted Answer

Cl

Question 8

Which of the following ions is isoelectronic with Ar?

Accepted Answer

Ca$$^{2+}$$

Question 9

Which of the following has the highest first ionization energy?

Accepted Answer

Ne

Question 10

Arrange the following ions in order of increasing radius: Na$$^+$$, Br$$^-$$, O$$^{2-}.$$

Accepted Answer

Na$$^+$$ \u003c O$$^{2-}$$ \u003c Br$$^-$$

Question 11

Which of the following elements would have the lowest second ionization energy?

Accepted Answer

Mg

Question 12

Which of the following ions has the same number of electrons as a neutral argon atom?

Accepted Answer

K$$^+$$

Question 13

Which of the following ions is expected to have the smallest ionic radius?

Accepted Answer

Ca$$^{2+}$$

Question 14

Which of the following ions is isoelectronic with S$$^{2-}$$?

Accepted Answer

Cl$$^-$$

Question 15

Which of the following atoms or ions has the largest radius?

Accepted Answer

Cl$$^-$$

Question 16

Which of the following ions has the electron configuration $$[Ne]3s^2$ 3p^6$?

Accepted Answer

Cl$$^-$$

Question 17

Which of the following ions would you expect to have the highest second ionization energy?

Accepted Answer

Na$$^+$$

Question 18

Which of the following ions is isoelectronic with Kr?

Accepted Answer

Br$$^-$$

Question 19

Which of the following ions has the greatest number of unpaired electrons?

Accepted Answer

Fe$$^{2+}$$

Question 20

Which of the following ions has the electron configuration $$[Ar]3d$$^{10}$$?

Accepted Answer

Zn$$^{2+}$$

Electron Configurations of Ions and Periodic Trends

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