English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

11 answers

If there are more electrons than protons, then the ion would have to be negative. If there are more protons than electrons, the ion would be positive. Only the number of electrons can change. If the number of protons changes, then the element would change.

2006-07-15 05:49:31 · answer #1 · answered by tooqerq 6 · 1 0

Valence electrons are the electrons in the outermost shell of an atom. Some elements only have 2, others have 7, and others have 4. Because of this, they do not have a full outermost shell and that is why they form different bonds to be able to have enough electrons to become full. Noble gases are the elements that already have 8 valence electrons, so they don't form bonds (no reaction). An ion is an atom or molecule which has lost or gained one or more valence electrons, giving it a positive or negative electrical charge. Anions are negatively charged ions that form when an atom gains electrons. Anions are negatively charged because there are more electrons than there are protons in their nuclei. Cations are positively charged ions that form when an atom loses electrons. Cations are positively charged because there are fewer electrons than protons. An element forms bonds with another element. One type of bond is an ionic bond. That is when one of the elements in the bond gives electrons to the other element and so loses electrons and the other element gains electrons. That is when an ion is formed. For instance, Chlorine has 7 valence electrons and Sodium has 1 valence electron. Since Sodium only has 1 electron, it is easier to give it away instead of having to take 7 more, so it gives it's 1 valence electron to Chlorine. Now they both have a full outer electron shell! Since Sodium gave 1 valence electron AWAY, it now has 1 less electron and therefore a charge of +1 (a cation). Chlorine RECIEVED 1 valence electron, so now it has one more electron and therefore a charge of -1 (an anion). Calcium has 20 electrons total. It has 2 valence electrons and when it gives these two away, it now has a charge of +2 (it is now an ion). Since it has 2 less electrons, it now only has 18 left. The element with this number (18) of electrons is Argon.

2016-03-27 06:27:30 · answer #2 · answered by Anonymous · 0 0

An ion is an atom (monoatomic ion), or group of atoms (polyatomic ion), which has an imbalance in the ration of protons to electrons.

Electrons have a charge of -1 [fundamental charges]
Protons have a charge of +1 [fundamental charges].
When the number of electrons equals the number of protons, the charges balance out and form a net charge of zero....thus a neutral atom/compound/.....

When there is an imbalance (either more electrons then protons or less electrons than protons) a net charge develops and the atom is turned into an ion.

Take the Potassium atom, K.
Potassium is an Alkali metal, sitting on the fast left hand side of the periodic table. Potassium would really "like" to loose an electron so as to obtain a Nobel gas configuration and become much more stable. When a Potassium atom looses an electron, the number of electrons does not equal the number of protons and the atom develops a +1 charge.
Calcium is very similar, it likes to loose two electrons and will thus develop of +2 charge.
On the other hand, Halogen's like to gain electrons (since they are 2nd from the right on the periodic table). Elements like Chlorine would like to gain an electron, and in doing so, form the Chloride ion with a -1 charge.
When you combine two of these ions together, you form an ionic compound. The ions combine in a proportion to make the overall charge on the compound zero. For exmaple, the K+ ion and the Cl- ion will combine in a 1:1 ratio to make Potassium Chloride, KCl with a neutral, zero, charge.

2006-07-15 05:53:25 · answer #3 · answered by mrjeffy321 7 · 0 0

in a neutral atom, the number of protons is equal to the number of electrons. but in case of a ion, the numbers are inequal. in a positive ion proton number is more than electron number and in a negative ion electron number is more than proton number. the difference between the two numbers corresponds to the charge of the ion.

2006-07-15 05:47:57 · answer #4 · answered by rinjam 2 · 0 0

If the charge of an ion is a positive n, that means that the atom has lost n electrons.

If the charge of an ion is a negative n, that means that the atom has gained n electrons.

The number of protrons alway stays the same.

2006-07-15 07:26:11 · answer #5 · answered by Alan Turing 5 · 0 0

if an atom or molecule has extra electrons over protons then it is a negatively charged atom, if it has less electrons than protons then it is a positively charged ion.

2006-07-15 05:48:22 · answer #6 · answered by aussie_east_ender 2 · 0 0

all i know is electrons are around the edge (shells) and the proton is in the middle with the neutrons. Protons have positive charges and electrons negative

2006-07-15 05:51:49 · answer #7 · answered by Anonymous · 0 0

An anion (negatively charged particle) has more electrons than the neutral atom. A cation (positively charged particle) has fewer electrons than the neutral atom.

2006-07-15 13:56:21 · answer #8 · answered by Mama R 5 · 0 0

imbalance...extra or missing electron in outer valent shell.


Danger Will Robinson..Danger.
negative Ion. needs a positive attitude.



Yours: Grumpy

2006-07-15 05:49:44 · answer #9 · answered by Grumpy 6 · 0 0

electrons compose the outer shell of the atom
protons are with nuetrons in the nucleus of the atoms
ions are the charges of atoms/compounds based on many forces... but cations are positive and anions are negatively charged.
just google chemistry.

2006-07-15 05:52:44 · answer #10 · answered by lamialestat 3 · 0 0

fedest.com, questions and answers