What can be stated for a particular element if only the group number of 14 is known? (1 point)

Question

• The element has 4 valence electrons.
• The element has 4 electrons.
• The element has 14 neutrons.
• The element has 14 protons.

Why are the noble gases the least reactive elements? (1 point)
• They are the last elements in each row on the periodic table.
• Their outer most energy levels are complete with 8 electrons.
• They are all radioactive.
• They have the same number of electrons as protons.

According to the octet rule, if an atom has fewer than 8 electrons in the outer most energy level, what is likely to happen? (1 point)
• It will release electrons and protons until it reaches a stable configuration.
• Nothing will happen, unless it is radioactive.
It will gain or lose neutrons until it has an equivalent number of neutrons to protons.
It will react with other nearby atoms to give, receive or share electrons until it has a full outer shell.

Answer 1

1. If only the group number of 14 is known, it can be stated that: • The element has 4 valence electrons.

2. The noble gases are the least reactive elements because: • Their outermost energy levels are complete with 8 electrons.

3. According to the octet rule, if an atom has fewer than 8 electrons in the outermost energy level, it is likely to: • It will react with other nearby atoms to give, receive or share electrons until it has a full outer shell.