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.
An atom becomes an ion by gaining or losing electrons. When an atom loses electrons, it becomes a positively charged ion (cation) as it has more protons than electrons. On the other hand, when an atom gains electrons, it becomes a negatively charged ion (anion) as it has more electrons than protons.
An atom is stable when its nucleus has a balanced ratio of protons and neutrons, and when its electrons are in filled energy levels. An atom is unstable when it has an imbalance of protons and neutrons in the nucleus, leading to radioactive decay in an attempt to reach a more stable configuration.
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.
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
positive!(: more protons = positive more electrons = negative say an atom has 2 more protons than electrons, it has a charge of 2+ if it had 3 more electrons than protons, it has a charge of 3- if electrons are taken away, what will the charge be? answer: positive, because there are less electrons same works vice versa. hope i helped! source: 8th grade science class(:
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.
An atom with more protons than electrons is a cation.
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.
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?
An atom becomes an ion by gaining or losing electrons. When an atom loses electrons, it becomes a positively charged ion (cation) as it has more protons than electrons. On the other hand, when an atom gains electrons, it becomes a negatively charged ion (anion) as it has more electrons than protons.
An atom is stable when its nucleus has a balanced ratio of protons and neutrons, and when its electrons are in filled energy levels. An atom is unstable when it has an imbalance of protons and neutrons in the nucleus, leading to radioactive decay in an attempt to reach a more stable configuration.
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.
An anion is an ion with more electrons than protons.
This atom become a positive ion (cation).
When the number of electrons and protons are not the same in an atom, it becomes an ion. An atom becomes positively charged if it loses electrons (more protons than electrons), and negatively charged if it gains electrons (more electrons than protons).
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.
If you mean an atom with more electrons than protons it is called an ion. More specifically an anion (negatively charged)