Question

true/false.
the tendency for elements to achieve a stable electron configuration by sharing electrons results in covalent bonds.
false
true

if an atom has 7 valence electrons, it will most likely:
gain 7 electrons to achieve a stable configuration.
lose 1 electron to achieve a stable configuration.
lose 7 electrons to achieve a stable configuration.
gain 1 electron to achieve a stable configuration.

which of the following elements is generally the least reactive among the main group elements?
chlorine (cl)
sodium (na)
fluorine (f)
neon (ne)

Explanation:

First Question (True/False)

Covalent bonds form when atoms share electrons to achieve a stable (octet or duplet) electron configuration. This matches the description, so the statement is true.

Second Question (Multiple Choice)

Atoms with 7 valence electrons (like halogens) need 1 more electron to complete their octet (stable 8 - electron valence shell). Gaining 7 or losing 1/7 electrons is energetically unfavorable; gaining 1 is easiest.

Third Question (Multiple Choice)

Neon is a noble gas with a complete octet (stable electron configuration). Noble gases are generally unreactive. Chlorine, Sodium, and Fluorine are reactive as they seek to achieve a stable electron configuration.

Answer:

True