Where can you find the mass number of an element on the periodic table?

Answer 1

The mass number or Atomic Mass number of an element is simply the number protons and neutrons in the atom's nucleus. Recall that the number of protons in the nucleus of an atom determines its elemental identity. Recall, also, that the number of neutrons in the nucleus of a given atom of an element can vary giving rise to different isotopes of that element. Hydrogen, the simplest of the elements, has a nucleus of one proton. But some atoms of hydrogen have a proton and a neutron in the nucleus. And there is an even rarer occurance of hydrogen with its proton and two neutrons in the nucleus. The mass numbers for these three isotopes of hydrogen are 1, 2 and 3 respectively. Helium has a nucleus that has two protons in it. Almost all the helium has an atomic mass number of 4, meaning that there are two protons and two neutrons in the nucleus. But there is a tiny percentage of helium that has only one neutron in the nucleus, and has mass number 3. A link to the Wikipedia article entitled Mass Number is provided.

Answer 2

It is actually very simple......what you have to do is that when you look at an element let's say potassium which is in the group I ,left hand side of the Periodic Table it will be given as k- which is the symbol and19 which is written at the bottom and 39which is written at top of the element's symbol and that's the mass no.

Answer 3

No. Mass number refers to a particular isotope of an element. It is the sum of the protons and neutrons in the nucleus of the atoms of the isotope. Atomic weight is found on the periodic table. Atomic weight of an element is the weighted average of the masses of naturally-occurring isotopes of that element.

Answer 4

We can find atomic mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.

Answer 5

We can find atomic mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.

Answer 6

The mass number is the sum of neutrons and protons in the atomic nucleus.

Answer 7

Mass number of element can be found by sum of protons and neutrons. Periodic table is arranged by atomic number.

Answer 8

Oxygen