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Paired electrons in one of the subshell become unpaired and are promoted to higher subshell to create more than one valencies.

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Valencies of all elements?

The valency of an element refers to the combining power of a given element. The valencies of all the elements is contained in the table of valencies. The valencies of the elements can be obtained by looking at the groups in the periodic table.


What is the difference in a compound and an element?

A compound is a combination of more than one element. (In an "element", all atoms - except perhaps for small amounts of impurities - have the same number of protons.)A compound is a combination of more than one element. (In an "element", all atoms - except perhaps for small amounts of impurities - have the same number of protons.)A compound is a combination of more than one element. (In an "element", all atoms - except perhaps for small amounts of impurities - have the same number of protons.)A compound is a combination of more than one element. (In an "element", all atoms - except perhaps for small amounts of impurities - have the same number of protons.)


Does a isotope of a element have more protons?

All isotopes of an element have the same number of protons, otherwise they would not be the same element. What varies is the number of neutrons, they can be more or less than in the stable isotope(s) of the element.


Can an element have more than 1 mass number?

noo i think


Can a single element have more than one atomic number?

No, each element has a unique atomic number that corresponds to the number of protons in its nucleus. Changing the number of protons would change the element itself.


What element has one more proton then argon?

The element with one more proton than argon is potassium, which has atomic number 19. Argon has an atomic number of 18.


What are used in a formula if the number of atoms of an element is more than one?

numbers


What is polyatomic number?

Polyatomic number are ions made up of more than one atomic element


What is an atom with more or fewer neutrons than atoms of the same element?

An atom of a certain element with a different number of neutrons compared with the common form of the element is called an isotope. Isotopes have the same number of protons and electrons in an atom, but a different number of neutrons (which means that they have a different atomic mass number).


Is there more than one atom used in element?

No, an element is 1 atom with a certain number of protons, neutrons, and electrons.


Which is more the number of elements or the number of isotopes?

The number of elements is more than the number of isotopes. There are 118 known elements on the periodic table, while each element can have multiple isotopes with varying numbers of neutrons. The number of isotopes per element can range from a few to dozens, depending on the element.


What element contains more than one element and has metallic properties?

No element contains more than one element.