If you read from left to right across a period in the periodic table, which statement is true?

a. the mass of the atoms increases.
b. the number of electrons decreases.
c. the properties of the elements are all roughly the same.
d. the elements are listed in the order they were discovered.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.