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How many electrons are in the third energy level of magnesium atom?

There are 2 electrons in the first energy level, 8 electrons in the second energy level, and 2 electrons in the third energy level of a magnesium atom, as it has an atomic number of 12 with electron configuration 2-8-2.


What is the number of electrons in the 1st energy level of magnesium?

All elements except hydrogen have two electrons in the first energy level.


Magnesium has an atomic number 12 and an atomic mass number 24 how many electrons are in its third energy shell?

Magnesium has 12 protons and electrons and its electronic configuration is 2.8.2, therefor it has 2 electrons in its 3rd energy level or elcectron outer shell


How many electrons are in the second energy level of magnesium?

There are 8 electrons in the second energy level of magnesium. This can be determined because magnesium has an atomic number of 12, meaning it has 12 electrons in total. The first energy level is filled with 2 electrons, leaving 10 electrons to distribute in the remaining energy levels, with 8 of those in the second level.


What is the total number of electrons in a Mg2 positive ion?

The Magnesium atom will lose 2 of its electrons to become a Magnesium ion with 10 electrons. (Mg2+) How many electrons does a magnesium ion have? How many electrons does a fluoride ion have? How many electrons does a fluoride ion have?


What is the number of electrons and oxidation number of magnesium?

Singl atom has 12 electrons. Oxidation number of it is +2.


Why does magnesium have an ionization number of 2?

Magnesium is in group 2 of the Periodic table, and so has 2 electrons in its outermost energy level. Therefore, its outermost energy level is full once 2 electrons are removed, and so it has an ionisation number of 2


Describe the correct arrangement of electrons in an atom that contains twelve electrons.?

An atom with 12 electrons will have two electrons in the first energy level and the remaining 10 electrons in the second energy level. This follows the electron configuration pattern of filling the lower energy levels first before moving to higher energy levels.


How electrons does magnesium have?

12 electrons in total as the atomic number of magnesium is 12


What on the periodic table has 12 electrons?

Magnesium, Mg, atom number 12, 12 protons and 12 electrons.


What is the valency number of magnesium?

Valency is not a word... but if you want to know the number of valence electrons that Magnesium has, it is 2. Magnesium's atomic number is 12.


What is the number of electrons in 3s in magnesium?

Magnesium (Mg) has an atomic number of 12, indicating it has 12 electrons. The electron configuration for magnesium is 1s² 2s² 2p⁶ 3s². Therefore, there are 2 electrons in the 3s subshell of magnesium.