Can someone please explain to me how i can find the answer ..thankss
2007-10-03 15:32:41 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
A Mg atom is neutral so its numbers of protons and electrons are the same, ie 12. A magnesium atom has to release 2 electrons so that it can have a charge of 2+. Mg -2e = Mg2+. The Mg2+ ion has 2 electrons less. hence, the no. of electrons=12-2=10. remember this: all cations, like Mg2+ has more protons than electrons. For anions, like Cl- it's the other way round.
2007-10-03 15:48:23 · answer #1 · answered by mil 2 · 0⤊ 0⤋
fact to remember: electrons have a negative charge.
Other fact to remember: ions form by losing or gaining electrons.
In order to get a positive charge, the atom must lose electrons, since electrons are negatively charged.
A negative charge comes from gaining electrons, of course.
So, a charge of +2 means you must have lost 2 electrons.
A neutral atom of magnesium has the same number of protons as electrons. So, a magnesium atom has 12 electrons.
The loss of 2 electrons to get the +2 charge means you now have 10 electrons in the ion.
2007-10-03 15:37:10 · answer #2 · answered by lhvinny 7 · 2⤊ 0⤋
1.) The charge of +2 means the Mg ion has two more protons than electrons. This means there are 10 electrons. 2.) If fluorine has a charge of (I assume positive) +1, then there is one more proton than electron. Since there are 9 protons, there msut be 8 electrons. 3.) Calcium's atomic number (how many protons it has in its nucleus) is 20, so an atom of calcium should have 20 electrons for a neutral charge. If the Ca atom loses two electrons, it gains a +2 charge.
2016-03-14 13:12:58 · answer #3 · answered by Anonymous · 0⤊ 0⤋
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RE:
A magnesium atom has 12 protons..how many electrons does a magnesium ion with a charge of +2 contains?
Can someone please explain to me how i can find the answer ..thankss
2015-08-11 16:51:44 · answer #4 · answered by Viviana 1 · 0⤊ 0⤋
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Electrons are negatively charged and protons are positively charged. 1. 10 2. 8 3. +2
2016-03-27 02:29:50 · answer #5 · answered by Anonymous · 0⤊ 0⤋
how many protons neutrons and electrons does magnesium-24 have?
2014-02-07 08:20:08 · answer #6 · answered by dustinjackson4110 1 · 0⤊ 0⤋
since the number of protons =the number of electrons
the answer is 12-2
to put it simply 10
2007-10-03 15:37:37 · answer #7 · answered by Dangela 1 · 0⤊ 0⤋