Most elements are stable with eight (8) valence electrons. True or False
Elements react in order to gain, lose, or share electrons. True or False
True. Most elements are stable with a full outer electron shell consisting of eight valence electrons.
True
True. The statement that most elements are stable with eight valence electrons is true. The valence electrons are the electrons in the outermost energy level of an atom, and having eight valence electrons results in a stable electron configuration, similar to that of the noble gases. This is known as the octet rule.
True. Elements react in order to gain, lose, or share electrons. This is because atoms strive to attain a stable electron configuration, typically by achieving a full outermost energy level of electrons. As a result, atoms will either gain, lose, or share electrons to complete or empty their valence shell and achieve a stable electron configuration.
I wonder about your chemistry teacher and the wording here.
1) Most elements do not have eight outer electrons, they have the same number of electrons as protons, and they are quite stable this way. Look at the periodic table. Now when elements combine, they tend to form compounds that gather filled valence shells (ie 8 electrons) around each atom nucleus. I have no idea which your teacher was thinking on.
b. Elements react chemically by forming electron bonds, by sharing, losing, or gaining electrons in new electron configurations.
Good luck in chem.