Fossils reveal the structures of plants and animals that lived long ago. which of the words or groups of words is the simple predicate?

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

What is a number added in front of a formula in order to balance the equation