Chapter 9

Use the periodic table to write electron configurations for each element. (a) \(\mathrm{Sr}\) (b) \(Y\) (c) \(\mathrm{Ti}\) (d) \(\mathrm{Te}\)

Use the periodic table to write electron configurations for each element. (a) Se (b) \(\mathrm{Sn}\) (c) \(\mathrm{Pb}\) (d) \(\mathrm{Cd}\)

How many \(2 p\) electrons are in an atom of each element? (a) \(\mathrm{C}\) (b) \(\mathrm{N}\) (c) \(\mathrm{F}\) (d) \(\mathrm{P}\)

How many \(3 d\) electrons are in an atom of each element? (a) \(\mathrm{Fe}\) (b) \(\mathrm{Zn}\) (c) \(\mathrm{K}\) (d) As

List the number of elements in periods 1 and 2 of the periodic table. Why does each period have a different number of elements?

List the number of elements in periods 3 and 4 of the periodic table. Why does each period have a different number of elements?

Name the element in the third period (row) of the periodic table with: (a) three valence electrons (b) a total of four \(3 p\) electrons (c) \(\operatorname{six} 3 p\) electrons (d) two \(3 s\) electrons and no \(3 p\) electrons

Name the element in the fourth period of the periodic table with: (a) five valence electrons (b) a total of four \(4 p\) electrons (c) a total of three \(3 d\) electrons (d) a complete outer shell

Use the periodic table to identify the element with each electron configuration. (a) \([\mathrm{Ne}] 3 s^{2} 3 p^{5}\) (b) \([\mathrm{Ar}] 4 s^{2} 3 d^{10} 4 p^{1}\) (c) \([\mathrm{Ar}] 4 s^{2} 3 d^{6}\) (d) \([\mathrm{Kr}] 5 s^{1}\)

Use the periodic table to identify the element with each electron configuration. (a) \([\mathrm{Ne}] 3 s^{1}\) (b) \([\mathrm{Kr}] 5 s^{2} 4 d^{10}\) (c) \([X e] 6 s^{2}\) (d) \([\mathrm{Kr}] 5 s^{2} 4 d^{10} 5 p^{3}\)