|Atomic mass||24,305 atomic mass units|
|Number of protons||12|
|Number of neutrons||12 °|
|Number of electrons||12|
One Mg2 + ion contains 10 electrons. A neutral magnesium atom would have 12 electrons to compensate for the positive charge of the 12 protons found
|First energy level:||2|
|Other energy levels:||8th|
|Third energy level:||2|
Answer and Explanation: Magnesium has 2 valence electrons. For the main group elements (no transition metal) the group number tells us the number of valence electrons in
When an ionic compound is made up of magnesium and oxygen, the magnesium ion has a charge of 2+ and the oxygen atom has a charge of 2–.
The number of electrons in a neutral atom equals the number of protons. The mass number of the atom (M) is equal to the sum of the protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the ordinal number (M) and the ordinal number (Z).
To write the symbol of an isotope, place the atomic number as a subscription and the mass number (protons plus neutrons) as the header to the left of the atomic symbol. The symbols for the two natural isotopes of chlorine are written as follows: 3517Cl and 3717Cl.
For example, a neutral calcium atom with 20 protons and 20 electrons easily loses two electrons. This creates a cation with 20 protons, 18 electrons and a 2+ charge. The name of a metal ion is the same as the name of the metal atom from which it is formed, so Ca2 + is called the calcium ion.
Magnesium is a group 2 metal that forms cations with a stable configuration of noble gas electrons when it loses both of its valence electrons. Bromine forms a stable electronic configuration of noble gas when it accepts an electron. For example, we find magnesium as a 2+ cation and bromine as anion 1 in a ratio of 1: 2 in the compound.
In magnesium, the valence is equal to the number of electrons (two) in the valence shell. For oxygen, the valence is eight minus the number of electrons in the outer shell (8-6 = 2).
The central atom is magnesium (draw the Lewis structure of the molecules to see them). There are two pairs of electrons around magnesium and not a lone pair. There are two bonding electron pairs and no lone pairs.
The orbit can hold up to six electrons. Put a good six in the 2p path and then the remaining two electrons in the number 3. So, the electron configuration of the magnesium will be 1s22s22p63s2.