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Just look on your Periodic Table. Count down from the top row, each row represents one more electron shell. So hydrogen and helium have only one, while the row potassium to krypton have four electron shells.
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∙ 14y ago
Wiki User
∙ 12y agoThe number of electrons is equal to the number of protons and to the atomic number of a chemical element (for a neutral atom).
Wiki User
∙ 9y agoElectron shells are numbered as K, L, M and N. There are 4 shells.
Wiki User
∙ 11y agoThe number of electrons in an element can be determined by its atomic number.
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Why is fluorine the most reactive non metal?
It is to do with the number of electron shells it has. it has the least number of shells in group 7, it is is easier to gain an electron as the attraction is strongest from the nucleus of the element.
As you move across a period elements have the same number of?
Electron shells
What is the number of of electron shells in CALCIUM?
4 electron shells; 2 electrons in first, 8 in second, 8 in third and 2 in valence shell.
The period of an element can be determined by what?
The total number of electron shells in an atom has determines its period grouping.
The chemical properties of an atom are determined by its atomic?
The chemical properties of an atom are determined by the number of protons that are existent in the particular atom. This value is given by the atomic number.
What Elements in the same row are filling up the same energy level as you move from left to right?
They have the same number of shells (or energy levels).
What is the number of electron shells in samarium?
Samarium has six electron shells.
How many shells can an electron cloud have?
The correct number of electron clouds or shells sodium has is 3.
What is the number of shells of livermorium?
Livermorium has 7 electron shells.
What is the number of shells neptunium has?
Neptunium has seven electron shells.
How many electron shells do noble gases have?
The number of electron shells depends on the noble gas. The number of shells will be equal to the period in which the noble gas is present.
How are the outer electron shells determined?
http://en.wikipedia.org/wiki/Valence_shell#Valence_shells
What is the correct number of shells neptunium the element has?
Neptunium has 7 electron shells.
Why is fluorine the most reactive non metal?
It is to do with the number of electron shells it has. it has the least number of shells in group 7, it is is easier to gain an electron as the attraction is strongest from the nucleus of the element.
As you move across a period elements have the same number of?
Electron shells
What are beryllium shell number?
Beryllium has two electron shells.
The periods in the Periodic Table have the same number of what?
They have the same number of electron shells.
