Why do you think an increase in atomic radius would result in a lower ionization energy?

Potassium and hydrogen react to form the ionic compound potassium hydride. (b) Use data in Figures 7.10 and 7.12 to determine the energy change in kJ/mol for the following two reactions:

K(g) + H(g) → K⁺(g) + H^-(g)

K(g) + H(g) → K^-(g) + H⁺(g)

Life on Earth evolved based on the element carbon. Based on periodic properties, what two or three elements would you expect to be most like carbon?

Ionization energies decrease moving down a group because the valence electrons are farther from the

Down a group in the periodic table, the change in ionization energy is due to

Pick the correct word to complete the sentence: The larger the atom, the (smaller/larger) its first ionization energy.

Consider the following equation:

Ca+(𝑔)+e−⟶Ca(𝑔)

Which of the following statements are true?

i. The energy change for this process is the electron affinity of the Ca+ ion.

ii. The energy change for this process is the negative of the first ionization energy of the Ca atom.

iii. The energy change for this process is the negative of the electron affinity of the Ca atom.

a. Only statement i is true.

b. Only statement ii is true.

c. Only statement iii is true.

d. Only statements i and ii are true.

e. All three statements are true.