Two.
Only one electron lost.
-3 electrons are gained,i.e,3 electrons are lost by Al and 3 electrons are gained by the other atom nearby.
78 electrons
Ag+ + e- --> Ag
If an atom loses 3 electrons, it gets a charge of +3. (One positive charge for every electron lost). If an atom loses 2 electrons, it gets a charge of +2.
Only one electron lost.
it should lose 3 electrons
-3 electrons are gained,i.e,3 electrons are lost by Al and 3 electrons are gained by the other atom nearby.
Only non-metal+non-metal is considered covalent. Plus, protons are NEVER shared; just the electrons.
Ions are formed when atoms gain or lose electrons in their outer orbit/shell. Electrons are negatively charged so if they lose an electron they become positively (plus) charged.
calcium ions that has lost electrons. It will give away electrons.
Magnesium that has lost 2 electrons.
An element you have a +2 charge It is had lost electrons. It would have to lose the same number of electrons that its positive charge is. So it would have lost 2 electrons.
there are 10 electrons.
78 electrons
Ag+ + e- --> Ag
Al2+ has 13 protonsAl itself has 13 electrons and 13 protons, 2+ means that Al has ''lost'' 2 electrons(and now have 11 electrons), the number of protons stays the same(13)Added:By the way, it is more common to take Al3+ as example, because Al has 3 valence electrons (in its outer shell) to donate to eg. oxygen: Al2O3 is formed.