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Only hydrogen and helium have the stated property. For all heavier elements than these two, the number of valence electrons is less than the total number of electrons, which must be the same as the number of protons in all neutral atoms.

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Q: Does an element's number of valence electrons equals the element's number of protons?
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Related questions

Does valence electrons equals number of protons?

YES!!!!


Why do you have groups on the periodic table of elements?

The groups on the periodic table directly correspond to the amount of valence electrons in the outer shell of the elements shown. For example in Group 8 (gases) they all have full valence electrons which equals 8 in the outershell. An element in group 1 only has 1 valence electrons like hydrogen or sodium.


When is an atom neutral When mass number equals number of protons equals number of electrons or when atomic number equals number of protons equals number of electrons?

An atom is neutral if the number of protons and the number of electrons it has are the same.


17 protons equals how many electrons?

17 electrons.


How many electrons are in the mass number of 111 and protons of 50?

There are 50 electrons. In a neutral atom, the number of electrons equals the number of protons.


In a neutral atom the number of electrons equals the number of what?

The number of electrons should equal the number of protons, otherwise you have an ion.


How many valence electrons does nitrogen z equals 7 have?

Five: When z equals 7, the total number of electrons must also be 7, but 2 of them are in the filled inner shell of a nitrogen atom and therefore are not valence electrons.


What is a metal with 25 electorns?

manganese. In the future look at the table of elements with the top number (called the atomic number: which is the number of protons, which also equals the number of electrons,) to see the number of electrons


What equals the amount of protons in an atom?

Yes


What does the number of protons in a atom equal?

Atoms that are neutral must have equal numbers of protons and electrons. This is because protons have a positive charge and electrons have a negative charge. Thus, for the charge to be neutral, the numbers of these particles must be equal.


The atomic number equals?

The atomic number is the number of protons in the nucleus of the atoms of a given number. The elements are arranged in increasing order of atomic number on the periodic table. In a neutral atom, the number of electrons is equal to the number of protons, however, the number of electrons is not the atomic number of an element.


What is the number of protons in a neutral atom equal to?

The number of protons equals the number of electrons in an uncharged atom.