11化学结课小测

姓名

Which mass is expressed to four significant digits?

Which of the following ions has the same number of electrons as Cl⁻?

Which of the following has the correct order of increasing atomic radius?

The first five ionization energies of an unknown element show a huge jump between the third and fourth ionization energies. Which of the following statements correctly identifies the element?

Which of the following chemical groups are least likely to react with other elements?

In solid methane, the forces between neighboring CH₄ molecules are best characterized as

The boiling points of the elements helium, neon, argon, krypton, and xenon increase in that order. Which of the following statements accounts for this increase?

Which of the following bonds is expected to have the greatest ionic character?

Both O²⁻ and F⁻ ions have the same number of electrons. Which statement best explains why F⁻ is smaller than O²⁻?

The first five ionization energies of a hypothetical element Q are shown below:

IE1 = 738 kJ·mol⁻¹

IE2 = 1450 kJ·mol⁻¹

IE3 = 7730 kJ·mol⁻¹

IE4 = 10550 kJ·mol⁻¹

IE5 = 13600 kJ·mol⁻¹

On the basis of these data, Q is most likely in which group of the periodic table?