answersLogoWhite

0

What is the valance number electrons for Group IIA elements?

When you look at the periodic table, you see 8 major columns. This represents the s and p orbitals, which hold 2 and 6 electrons respectively. The elements are placed in a column, based on the number of electrons in the s and p orbital of the outer shell. For example, Mg is in column 2 because it has 2 electrons in the s orbital of the 3rd shell. All elements in column 2 have 2 electrons in the s orbital of their outer shell. The valance number is the charge on an ion of an element. Elements in column 2 do not have a strong attraction for the 2 electrons in their outer shell. An element such as O in column 6 has a stronger attraction for electrons than Magnesium. When an atom of Mg is close enough to atom of O, and a little heat is supplied, the 2 electrons in the outer shell of Mg will move to the outer shell of the O atom giving the O atom 8 electrons in its outer shell, making it very stable.

After the 2 electrons in the outer shell of the Mg atom have moved to the outer shell of the O atom, the Mg ion has 2 less electrons in its shells than protons in the nucleus atom. Since protons have a +1 charge and electrons have a -1 charge, the Mg ion has a net charge of +2. The O atom now has 2 more electrons in its outer shell and has a net charge of -2. The charge is the valance number. All atoms of elements in GroupIIa have 2 electrons in the in their outer shell so their valence number is +2.

Do a google search for, "magnesium burning", and go to images, and you will see what happens. If you are in a chemistry class, ask your instructor to do this lab.

User Avatar

Wiki User

15y ago

What else can I help you with?

Continue Learning about Chemistry

What is the number of valence electrons for group 2 elements?

Group 2 metals have 2 valence electrons. In fact, the number of valence electrons of elements can be deduced from the group number (e.g. group VII elements have 7 valence electrons).


What does the group number of A elements in the AB numbering system tell about valence electrons?

The group number of A elements in the AB numbering system indicates the number of valence electrons. For example, elements in Group 1 have 1 valence electron, elements in Group 2 have 2 valence electrons, and so on. Valence electrons are important because they determine the chemical properties and reactivity of an element.


How can one determine the number of valence electrons in an atom?

To determine the number of valence electrons in an atom, look at the group number on the periodic table. The group number indicates the number of valence electrons. For example, elements in group 1 have 1 valence electron, elements in group 2 have 2 valence electrons, and so on.


How can one determine the number of valence electrons in an element?

To determine the number of valence electrons in an element, look at the group number on the periodic table. The group number indicates the number of valence electrons. For example, elements in Group 1 have 1 valence electron, while elements in Group 2 have 2 valence electrons.


How can one determine how to get valence electrons in an atom?

To determine the number of valence electrons in an atom, look at the group number on the periodic table. The group number indicates the number of valence electrons. For example, elements in Group 1 have 1 valence electron, elements in Group 2 have 2 valence electrons, and so on.

Related Questions

What is the number of valence electrons for group 2 elements?

Group 2 metals have 2 valence electrons. In fact, the number of valence electrons of elements can be deduced from the group number (e.g. group VII elements have 7 valence electrons).


Elements in a group have-?

Elements in group have same number of valence electrons. They also have same chemical properties.


What does the group number of A elements (in the AB numbering system) tell about valence electrons?

The group number of A elements in the AB numbering system tells you the number of valence electrons that element has. Elements in the same group have the same number of valence electrons, which determines their chemical properties.


Where are elements with the same number of valence electrons?

Elements with the same number of valence electrons are found in the same group or column of the periodic table. This is because elements in the same group have the same number of valence electrons, which determines their chemical properties. For example, all elements in group 1 have 1 valence electron.


Where do elements have the same number in valence electrons?

Elements in the same group have the same number of valence electrons.


What does the group of A elements tell about valence electrons?

All elements in the same A group will have the same number of valence electrons.


What does the group number of A elements in the AB numbering system tell about valence electrons?

The group number of A elements in the AB numbering system indicates the number of valence electrons. For example, elements in Group 1 have 1 valence electron, elements in Group 2 have 2 valence electrons, and so on. Valence electrons are important because they determine the chemical properties and reactivity of an element.


What is the different about the valence electrons for all elements in a group?

Valence electrons for elements in the same group are the same because they are located in the outermost energy level of an atom. This common number of valence electrons is what gives elements within a group similar chemical properties.


Elements in a group vhave?

Elements in a group have the same number of electrons in their outer orbital.


How do you find out how many electrons are in an outer energy level?

You can determine the number of electrons in the outer energy level of an atom by looking at its group number on the periodic table. For main group elements, the group number corresponds to the number of valence electrons. For example, group 1 elements have 1 valence electron, group 2 elements have 2 valence electrons, and so on.


The elements within a group have a similar number of?

Elements in the same group have the same number of valence electrons. These are the outer-shell electrons that react with other elements.


Can some elements have the same number of electrons in their outermost level?

Elements in the same group have the same number of valence electrons.