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?

5. to comply with implementation requirements, shops must ensure that paint booth exhaust systems use efficient spray booth filters. a) 75% b) 100% c) 50% d) 98%

Which characteristic demonstrates a healthy self-esteem? accepts others does not listen well seeks constant approval frustrates easily

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force