What is an element? O Substances that can be separtated by physical chemical means.

O Simplest form of matter.

O The smallest unit of an element that maintains the chemial identity of the element.

O Contains more than one kind of particle.

The characteristic 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 and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What is the value of keq for the reaction expressed in scientific notation?

How have the greenhouse gasses increased from the year 2000 to 2018