Regents Chemistry Exam Explanations August 2016

Base your answers to questions 60 through 63 on the information below and on your knowledge of chemistry.
The radius of a lithium atom is 130. picometers, and the radius of a fluorine atom is 60. picometers. The radius of a lithium ion, Li, is 59 picometers, and the radius of a fluoride ion, F^-, is 133 picometers.
60 Compare the radius of a fluoride ion to the radius of a fluorine atom. [1]
Answer-->The radius of a fluoride ion is larger than the radius of a fluorine atom.
61 Explain, in terms of subatomic particles, why the radius of a lithium ion is smaller than the radius of a lithium atom. [1]
Answer-->A lithium atom loses its second-shell electron, so the lithium ion has only one shell of electrons.
OR
A lithium ion has one fewer electron.
62 In the space in your answer booklet, draw a Lewis electron-dot diagram for a fluoride ion. [1]
Link to answer
63 Describe the general trend in atomic radius as each element in Period 2 is considered in order from left to right. [1]
Answer-->The atomic radius gets smaller.

on to Questions 64-65