1) Compare the following two elements given their electron configurations:
| A: [Ne]3s23p1
| B: [Ne]3s1
|
(a) Both A and B are metals.
(b) A has the higher first ionization energy.
(c) B has the larger atomic radius.
(d) Both A and B form positive ions.
2) Compare the following two elements given their electron configurations:
| A: [Ar]4s2
| B: [Ne]3s23p5
|
(a) A is a metal and B is a nonmetal.
(b) A has the higher first ionization energy.
(c) B has the larger atomic radius.
(d) A forms negative ions and B forms positive ions.
3) Compare the following two elements given their electron configurations:
| A: [He]2s22p5
| B: [Ar]3d64s2
|
(a) A is a nonmetal and B is a transition metal.
(b) B has the higher first ionization energy.
(c) A has the larger atomic radius.
(d) A forms negative ions and B forms positive ions.
4) Compare the following two elements given their electron configurations:
| A: [Ar]3d104s24p2
| B: [He]2s22p4
|
(a) A is a metalloid and B is a nonmetal.
(b) A has the higher first ionization energy.
(c) B has the larger atomic radius.
(d) B forms negative ions.
5) Element X has an atomic number of 15. Which of the following statements about the electron configuration of X is correct?
(a) X has three valence electrons.
(b) The ion X3- has the electron configuration [Ne]3s2.
(c) X will have one empty 3p orbital.
(d) An X atom has one valence orbital with electrons of opposite spin.
6) Element X has an atomic number of 16. Which of the following statements about the electron configuration of X is correct?
(a) X has six valence electrons.
(b) The ion X2- has the electron configuration [Ne]3s23p2.
(c) X has one empty 3p orbital.
(d) X has three valence orbitals that each contains two electrons of opposite spin.
7) Element X has an atomic number of 26. Which of the following statements about the electron configuration of X is correct?
(a) X has empty 3d orbitals.
(b) The ion X2+ has the electron configuration [Ar]3d44s2.
(c) X has the electron configuration [Ar]3d8.
(d) An X atom has one 3d orbital with electrons of opposite spin.
8) Element X has an atomic number of 9. Which of the following statements about the electron configuration of X is correct?
(a) X has 5 valence electrons.
(b) The ion X- has the electron configuration [He]2s22p6.
(c) X has the electron configuration [Ne]2p22p5.
(d) An X atom has 4 valence orbitals with electrons of opposite spin.