An atom's identity is determined by the number of protons. The number of protons in the nucleus of an atom defines the element and its position on the periodic table.
A) What determines an atom’s identity? (1 point)
the number of protons
the number of electrons
the number of neutrons
the valence number
7 answers
A) What can be stated for a particular element if only the group number of 14 is known?
(1 point)
The element has 4 electrons.
The element has 4 valence electrons.
The element has 14 neutrons.
The element has 14 protons.
(1 point)
The element has 4 electrons.
The element has 4 valence electrons.
The element has 14 neutrons.
The element has 14 protons.
If only the group number of 14 is known for a particular element, it can be stated that the element has 4 valence electrons. In the periodic table, elements in group 14 (IVA) have four electrons in their outermost electron shell.
A) Why are the noble gases the least reactive elements? (1 point)
They are all radioactive.
They are the last elements in each row on the periodic table.
They have the same number of electrons as protons.
Their outer most energy levels are complete with 8 electrons.
They are all radioactive.
They are the last elements in each row on the periodic table.
They have the same number of electrons as protons.
Their outer most energy levels are complete with 8 electrons.
The noble gases are the least reactive elements because their outermost energy levels are complete with 8 electrons. This full valence shell configuration makes them stable and less likely to react with other elements.
A) 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)
Nothing will happen, unless it is radioactive.
It will release electrons and protons until it reaches a stable configuration.
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.
level, what is likely to happen? (1 point)
Nothing will happen, unless it is radioactive.
It will release electrons and protons until it reaches a stable configuration.
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.
According to the octet rule, if an atom has fewer than 8 electrons in its outermost energy level, it will react with other nearby atoms to give, receive, or share electrons until it has a full outer shell.
1 answer