Read the list of elements given below. F, Cl, Br, I

Which of the following about the elements is true?

All of them are highly reactive metals.
All of them are highly reactive nonmetals.
F and Cl are reactive nonmetals and Br and I are highly reactive metals.
F and Cl are reactive metals and Br and I are highly reactive nonmetals.

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons

Equation for the calculation double 2 and then add 5

Anew obstacle course is home to several new types of challenging obstacles. one such obstacle is traversing a 15-stair staircase. to make it more challenging, the stairs are not uniformly spaced. rather, the vertical space between consecutive stairs for the first 10 stairs is 113 feet and the vertical space for the last 5 stairs is 134 feet. what is the total vertical distance traveled ascending and descending the entire 15-stair staircase?