The isotope 87Sr- strontium and also some other isotopes as:
55 32 Ge
54 33 As
53 34 Se
52 35 Br
51 36 Kr
50 37 Rb
48 39 Y
47 40 Zr
46 41 Nb
45 42 Mo
44 43 Tc
43 44 Ru
- where the first column is the number of neutrons, the second the number of protons.
Rubidium is a metal element. Mass number of it is 85.
Francium has 87 protons; the number of neutrons is different for each isotope and francium has approx. 40 isotopes and isomers. Number of neutrons = Atomic mass of the isotope - 87
The atomic number of francium is 87. This means that it has 87 each of protons and electrons. The number of neutrons depends on the isotope, but the most common one, Fr-223, has 223 - 87 = 136 neutrons. (The number of neutrons is always the isotope mass number minus the atomic number.)
The element with a mass number of 37 is chlorine (Cl).
The atomic number of an element is the number of protons in the nucleus of each atom of the element. Mass number is a property of a particular isotope of the element rather than of the element itself: The mass number is the sum of the numbers of protons and neutrons in the nucleus of each atom of the isotope.
Francium is a non meta element. Atomic number of it is 87. It is unstable.
Strontium is a metal element. Atomic mass of it is 87.
Rubidium is a metal element. Mass number of it is 85.
Sodium is a metal element. Mass number of it is 23.
Francium is the chemical element with the atomic number 87.
Francium has 87 protons; the number of neutrons is different for each isotope and francium has approx. 40 isotopes and isomers. Number of neutrons = Atomic mass of the isotope - 87
The atomic number of francium is 87. This means that it has 87 each of protons and electrons. The number of neutrons depends on the isotope, but the most common one, Fr-223, has 223 - 87 = 136 neutrons. (The number of neutrons is always the isotope mass number minus the atomic number.)
Vanadium is a metal element. Mass number of it is 51.
Magnesium is a metal element. Mass number of it is 24.
Copper is a metal element. Mass number of it is 64.
The element with a mass number of 37 is chlorine (Cl).
The atomic number of an element is the number of protons in the nucleus of each atom of the element. Mass number is a property of a particular isotope of the element rather than of the element itself: The mass number is the sum of the numbers of protons and neutrons in the nucleus of each atom of the isotope.