The atomic number is the count of how many protons an atom has in its nucleus (and therefor also the count of how many electrons the neutral atom possesses). The atomic number us unique for each element and positions the element in the Periodic Table.
The element with atomic number 39 is Yttrium (Y).
The 39th chemical element is yttrium.
phosphorous has mass number 39 in its normal state.
Atomic number 38 is Strontium (Sr).
Yttrium
thulium
Potassium
Argon
Relative atomic mass, also called atomic weight, is listed on the periodic table for each element. There is no element listed on the periodic table with a relative atomic mass of 15.5.
Lead is a metal element. Atomic Mass number of it is 207.
THE ELEMENT WHICH HAVE ATOMIC MASS 78.96 IS SELENIUM OF 6TH GROUP WITH ATOMIC NUMBER 34 AND SYMBOL (Se)
Carbon is a non metal element. Atomic mass number of it is 12.
Cobalt is a meta element. Atomic mass of it is 59.
399
399
Magnesium is a meta element. Atomic mass of it is 24.
The element is Iodine (I). It has an atomic mass of about 126.9.
Atomic mass is the mass of 1 mole of the element. Atomic number is the number of protons the element has
the Atomic Mass
Nickel is a meta element. Atomic mass of it is 59.
Antimony is a meta element. Atomic mass of it is 122.
Iron is a meta element. Atomic mass of it is 56.
Gold is a meta element. Atomic mass of it is 197.
Fluorine is a meta element. Atomic mass of it is 19.
gold is a meta element. Atomic mass of it is 197.