Which element will have a higher electronegativity? A. Fluorine
B. Hydrogen
C. Bromine
D. Phosphorus

What is driving behind plate tectonics (plate movment)? a) gravity only b) inertia c) convection and gravity d) the sun theres no option for science so i picked chemistry. plz

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.