Question

Give the name(s) of the element(s) fitting each of the following descriptions.

Occurring in nature as diatomic molecules

The inert gases

The halogens

The noble gas in Period 4

The element whose +3 cation has the same configuration as neon

The element whose -2 anion has the same configuration as argon

The element from the first 10 elements that would be most similar in properties to radium

The Period 3 element having 4 valence electrons

The Period 3 element with an effective nuclear charge of +4

The Period 3 element with the largest first ionization energy

The Group 3A element with the largest first ionization energy

The Period 3 element with the largest (i.e., most negative) electron affinity value

The Period 3 element with the largest atomic radius

The Group 4A element with the largest electronegativity value

The halogen in Period 5

The element in Period 3 most similar in properties to tin

The element in Period 3 having three valence electrons

The Period 4 element having a half-filled p subshell

The Period 4 element with the largest electronegativity value

The Group 2 element with the largest atomic radius

The Period 4 element with the smallest first ionization energy

The Group 4A element with the smallest first ionization energy

The Period 3 element having a half-filled p subshell in the valence shell

Answer 1

Occurring in nature as diatomic molecules-----------------> H2, O2, N2, Cl2

The inert gases---------------> He ,Ne , Ar , Kr , Xe , Rn

The halogens ----------------> F , Cl , Br , I

The noble gas in Period 4 --------------------> Kr

The element whose +3 cation has the same configuration as neon -----------------> Al

The element whose -2 anion has the same configuration as argon --------------------> S^-2

The element from the first 10 elements that would be most similar in properties to radium -------> Be

The Period 3 element having 4 valence electrons ------------------> Si

The Period 3 element with an effective nuclear charge of +4 -----------> Si

The Period 3 element with the largest first ionization energy --------------> Ar

The Group 3A element with the largest first ionization energy ------------> B

The Period 3 element with the largest (i.e., most negative) electron affinity value ------------> Na

The Period 3 element with the largest atomic radius ---------------> Na

The Group 4A element with the largest electronegativity value ------------> C

The halogen in Period 5 ----------------------> Iodine (I)

The element in Period 3 most similar in properties to tin -----------------> Si

The element in Period 3 having three valence electrons ------------------> Al

The Period 4 element having a half-filled p subshell -----------------> As

The Period 4 element with the largest electronegativity value ---------------> Br

The Group 2 element with the largest atomic radius ------------------> Ra

The Period 4 element with the smallest first ionization energy -------------> K

The Group 4A element with the smallest first ionization energy -----------------> Pb

The Period 3 element having a half-filled p subshell in the valence shell ---------------> P