An atom of an element x may be written as 9 4x
a) what does the number 9 indicate ?
what does the number 4 indicate ?
what is the number of protons in atom x?
d) what is the number of neutrons in atom x?
what is the number of electrons in atom x
how many electrons are there in the outermost shell

Which of the following best describes the purpose of technology?

Approximately what portion of the foods that we eat have been genetically modified in some way? a.fewer than 10% b.about 50% c.nearly 100%

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.