the reactivity of depends on the number of its outer shell electrons. one all outer shell electrons are there then there is little reactivity. If the atomic number is 19 then the element will 19 protons and 19 electrons. this means it has 2 electrons in the 1st shell 8 in the second 8 in the 3rd and 1 in the last. as it only has one it will be very reactive =)
The atomic number of an element is determined by the number of protons.
The identity of the element is determined solely by the atomic number, which is the number of protons.
Fluorine is the most reactive non metal.Caesium is most reactive metal in the table.Fluorine has atomic number 9.
Yes,Fluorine is the most reactive non metal.It has atomic number of 9.It is the lightest Halogen.
Yes,Fluorine is the most reactive non metal.It has atomic number of 9.It is the lightest Halogen.
The atomic number of an element is determined by the number of protons.
The identity of the element is determined solely by the atomic number, which is the number of protons.
subtract the atomic number from the mass number
Fluorine is the most reactive non metal.Caesium is most reactive metal in the table.Fluorine has atomic number 9.
That would be the element with the highest atomic number but the lowest number of valence electrons.
The atomic number is equal to the number of protons.
Vanadium is a chemical element with the symbol V and an atomic number of 23. It is moderately reactive and only becomes more reactive with hot acids.
Could you please re-ask your question in a better manner, because that question does not make sense. Are you trying to ask the atomic mass of the element with the atomic number of 7? or are you just stating that there is an element with the atomic number of 7? because that is not a very good question.
The number of protons is equal to atomic number and the number of electrons (for a neutral atom).
The number of protons determine the atomic number of an element. There are the same amount of protons as electrons in a regular element.
Atomic Number is 47; Atomic Mass is 137.3; Element Name is Barium; Classified as the Alkaline Earth Metals.
The number of protons determine the element. It is equal to the atomic number. The number of electrons is equal to the number of protons only of the atom is neutral.