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Four (4) electrons

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Q: Number of Valence Electrons of thorium?
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How many electrons and protons does thulium have?

Thulium has an electronic configuration of [Xe] 4f136s2 You could count either 2 or 15. The concept of valence electrons is almost meaningless when applied to the lanthanides. Thulium is a typical member of these and has one common oxidation state, +3


What is the number of protons and electrons in thorium?

Thorium's atomic number is 90. Thus, thorium has 90 protons per atom. To be electrically neutral then, thorium must also have 90 electrons per atom.


How many electrons are in thorium?

Thorium, with the chemical symbol Th, is the chemical element with the atomic number 90.


How do you find number of valence electrons?

Take the atomic number then subtract the amount of valence electrons. Example: Number of non valence (inner) electrons in Sulfur: 16 (atomic number) - 6 (valence electrons) = 10 (valence or inner electrons)


What is the number of valence electrons for He?

Two valence electrons.


Number of valence electrons in Ga?

3 electrons !


How do you find the number of non-valence electrons?

Take the atomic number then subtract the amount of valence electrons. Example: Number of non valence (inner) electrons in Sulfur: 16 (atomic number) - 6 (valence electrons) = 10 (valence or inner electrons)


How can you find the number of valence electrons?

the number of valence electrons is the number group on the table its on


Which number tells you the number of valence electrons?

The group numbers tell the number of valence electrons. Without looking on the group number you can also tell the number of valence electrons by looking at the highest energy level in the electronic configuration.


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 is the expected number of valence electrons for a group 3 A element?

The expected number of valence electrons for a group 3 A element is 5 number of valence electrons.


How do you use te periodic table to identify the number of electrons available for bonding?

Valence electrons describe the number of available electrons for bonding. The group number describes outermost electron. The elements in same group has same valence electrons.The number of electrons available for bonding are the valence electrons. In an element, the group number is equal to the number of valence electrons. So the number of electrons available for bonding can be identified by the group number.