fluorine (f), chlorine (cl), bromine (br), and iodine (i) are elements in the same group on the periodic table. why are these elements grouped together?

When you apply for a college what is the main thing that will get you accepted?

When your working with the passage-based reading questions on the psat do all of the following except. a)make sure you read each question throughly. b) try to answer each question before you look at the answers. c) plan to spend most of your time reading the passage. d) make sure your answer choice is the most correct number me

In this food web, which group would increase in number if snakes were eliminated? a. producers b. decomposers c. primary consumers d. secondary consumers e. tertiary consumers