Question

question 6
6 pts
a lewis electron dot symbol shows
all the electrons in the ground - state of an atom.
all the core electrons in the ground - state of an atom.
all the valence electrons in the ground - state of an atom.
all the electrons in the outermost sublevel in an atom.
question 7
6 pts
a copper(ii) ion forms when a copper atom
gains one electron.
gains two electrons.
loses one electron.
loses two electrons.

Explanation:

For Question 6, a Lewis electron - dot symbol represents the valence electrons in the ground - state of an atom. It is a way to visualize the electrons available for bonding. For Question 7, a copper(II) ion ($Cu^{2 + }$) is formed when a copper atom loses two electrons. A positive ion is formed by electron loss, and the Roman numeral II indicates a + 2 charge.

Answer:

Question 6: all the valence electrons in the ground - state of an atom.
Question 7: loses two electrons.