Nothing at all! Lots of elements have more than 18 total electrons. In fact, every element with an atomic number of 19 or more has more than 18 electrons!
But probably what is really being asked here is in reference to 18 valence electrons. The 18-electron rule, which is essentially the equivalent of the octet rule applied to transition metals, says that transition metals (that have 10 d-orbital electrons) are most stable when they have 18 electrons. Nonetheless, nothing in particular happens if they have more or less except that they are more reactive and such a configuration will probably not last long before reacting or decomposing to form something else.
C - When an Atom has more electrons than protons it has a negative charge.
negative charge (-) will be more on the atom than positive (+) charge...../..?
If an atom has more protons then electrons the atom will have a negative charge.If the atom has more electrons then protons the atom will have a positive charge.If the atom has equal numbers of electrons and protons then the atom becomes neutral.However if you're wondering why an atom is stable then that means that it has all the electrons inside of it paired. If the atom is unstable it has unpaired electrons.
NoYes. A neutral atom will have the same number of protons and electrons.
There are the same number of protons as electrons in each atom unless the atom does not have a neutral charge, if it has a negative charge it has that more electrons, and if it has a positive charge it has that much more protons hope this helps
no a neutral atom does not have more protons than it does atoms. if it really were neutral it would have the equal amount of electrons and protons. if an atom had more protons than neutrons, it would be a positive atom and vice versa. so to answer this question. NO A NEUTRAL ATOM DOES NOT HAVE MORE PROTONS THAN NEUTRONS.
Atoms are neutral as long as they contain the same number of protons as electrons. If there are more electrons than protons, the atom has a negative charge. If there are less electrons than protons, the atom has a positive charge.
An atom with more protons than electrons is a cation.
The charge of an atom depends on the electrons compared to protons. Electrons being negatively charged, protons being positive. If there are more protons, the atom is positive, and if there are more electrons, the atom is negative.
If an atom has more protons then electrons the atom will have a negative charge.If the atom has more electrons then protons the atom will have a positive charge.If the atom has equal numbers of electrons and protons then the atom becomes neutral.However if you're wondering why an atom is stable then that means that it has all the electrons inside of it paired. If the atom is unstable it has unpaired electrons.
NoYes. A neutral atom will have the same number of protons and electrons.
That is called a neutral atom, because it has no electric charge. If the atom has an electric charge (i.e., it has more protons than electrons, or more electrons than protons), it is called an ion.That is called a neutral atom, because it has no electric charge. If the atom has an electric charge (i.e., it has more protons than electrons, or more electrons than protons), it is called an ion.That is called a neutral atom, because it has no electric charge. If the atom has an electric charge (i.e., it has more protons than electrons, or more electrons than protons), it is called an ion.That is called a neutral atom, because it has no electric charge. If the atom has an electric charge (i.e., it has more protons than electrons, or more electrons than protons), it is called an ion.
An anion is an ion with more electrons than protons.
The number of protons compared to electrons is what determines the charge of the atom. If there are more protons than electrons the atom is positively charged. If there's more electrons than protons the atom is negatively charged. Does this answer your question?
If the atom has more electrons than protons, then yes it is an ion.
Electrons have a positive charge and protons have a negative charge. An atom's nucleus is 99.95% of its weight. When an object gains more electrons, it gains a negative charge that over comes the positive charge. This only happens when there are more electrons than protons.
There are the same number of protons as electrons in each atom unless the atom does not have a neutral charge, if it has a negative charge it has that more electrons, and if it has a positive charge it has that much more protons hope this helps
This atom become a positive ion (cation).
no a neutral atom does not have more protons than it does atoms. if it really were neutral it would have the equal amount of electrons and protons. if an atom had more protons than neutrons, it would be a positive atom and vice versa. so to answer this question. NO A NEUTRAL ATOM DOES NOT HAVE MORE PROTONS THAN NEUTRONS.