Zinc has more electrons in its outer energy level than Calcium. Because of this, itsnucleus is more attracted to this energy level and pulls it more the nucleus in Calcium. Because of this greater attraction it is harder to remove the electron from Zinc.
Magnesium is smaller than Calcium and hence the valence electrons are nearer the positive nucleus and thus held tighter. In Calcium the valence electrons being further away find it easier to escape.
The 3s.
Phosphorus has a higher energy level so it pulls harder on its electrons.
Sodium has one valence electron, magnesium has two. If this valence electron is lost, then noble gas configuration is obtained. It is easy to lose one electron than two, so sodium is more reactive than magnesium
Magnesium does oxidize. That is why magnesium is often found on earth with a thin layer of Magnesium Oxide (MgO). For this reason when using magnesium in experiments you must always sand it to remove the oxide layer.
An atom or ion with a full outer shell is more stable than one with an incomplete outer shell. In the outer shells of calcium and magnesium there are two electrons. It takes less energy to remove these two electrons to form a full outer shell than to add six electron to the same end. Therefore, ions of charge +2 can easily be formed. It then takes a lot more energy to ionise the calcium or magnesium further to an ion with a charge of +3, and if it was ionised that far it would react quickly and easily with free electrons to regain its full outer shell and charge of +2. The energy needed to remove an electron from an atom or ion is called the ionisation enthalpy. In terms of this, the first and second ionisation enthalpies (making an ion with a charge of +2) are relatively low, but the third ionisation enthalpy is very high, making an ion with a charge of +3 unlikely.
magnesium, calcium, iron
The 3s.
oxygen
First ionization energy of magnesium = 870/ kj/mol First ionization energy of phosphorous = 589 kj/mol So, magnesium has the larger ionization energy required to pull the first valance electron. Do you know why?
magnesium has a 2 valence electrons. because the third electron is not a valence electron, or in the outer shell, much more energy would be needed to remove it
This is false. The ionization energy is the amount of energy that is required to remove the electron. Therefore, if it requires more energy, it is harder to remove the electron.
Phosphorus has a higher energy level so it pulls harder on its electrons.
Well . . . there are no calcium deposits in water, there is only calcium. The deposits happen on things that the water falls on, then dries. What is left is a deposit. To remove the calcium (and magnesium) from water, you run the water through a tank full of little beads of "Filtersord". Most water purifiers use this along with charcoal, which removes bits of dust, and so forth.
Sodium is easier to form Na+ then Calcium forming Ca2+. The main reason is because Sodium has got 1 valence electron, which is more unstable than Calcium having 2 valence electrons. It requires less energy to remove one electron from Sodium than two electrons from Calcium. Therefore, Sodium is higher than Calcium in the reactivity series.
Sodium has one valence electron, magnesium has two. If this valence electron is lost, then noble gas configuration is obtained. It is easy to lose one electron than two, so sodium is more reactive than magnesium
The electron configuration of magnesium is 1s2 2s2 2p6 3s2. Mg+ has one less electron (electrons have negative charge, so a positive charge is a lack of electrons) so you remove one from the outermost orbital: 1s2 2s2 2p6 3s1, or simply [Ne] 3s1.
Magnesium does oxidize. That is why magnesium is often found on earth with a thin layer of Magnesium Oxide (MgO). For this reason when using magnesium in experiments you must always sand it to remove the oxide layer.