3 Elements in the Periodic Table are arranged in order of their proton number. a Define the meaning of the term proton number.
b Argon, proton number 18, has a larger mass number than potassium, proton number 19. Explain why this .
d An atom of which element has only two of the three particles listed in the table above?
e Argon and helium are both noble gases. In what way are their electron structures similar? ​

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

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

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