Ascientist examining the periodic table sees that the element magnesium (mg) has the atomic number of 12.
based on this knowledge, what does the scientist immediately know is true about magnesium atoms?
magnesium atoms have 12 protons.
magnesium atoms have 6 protons and 6 electrons.
magnesium atoms have 12 neutrons.
magnesium atoms have 6 protons and 6 neutrons.

Which statement is best described as a atom

In 2002, the rare earth elements mine in mountain pass, california was closed because

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.