A new element with atomic number 116 was discovered in 2000. In 2012 it was named livermorium, Lv. A — Atomic Structure Chemistry Question
Problem Context
A new element with atomic number 116 was discovered in 2000. In 2012 it was named livermorium, Lv. Although Lv is radioactive and short-lived, its chemical properties and reactivity should follow periodic trends.
Model Answer
7s^2 7p^4
1 point is earned for the correct configuration.
Model Answer
LvH2 (or H2Lv)
1 point is earned for the correct formula.
Model Answer
Less than that of Po. The two atoms have comparable effective nuclear charges, but the valence electrons in Lv would be at a greater distance from the nucleus than those in Po. By Coulomb's law, the attractive force between the valence electrons and the nucleus decreases by the inverse square of the distance between them.
1 point is earned for a correct prediction with a valid justification.
Model Answer
Average atomic mass = (2/10)(291.2) + (3/10)(292.2) + (5/10)(293.2) = 292.5 amu
1 point is earned for the correct average atomic mass.