Carbon or more accurately, Carbon-12
The mole is the atomic weight expressed in grams.
Atomic Mass is the no. of protons+no. of nuetron
Atomic number and atomic mass are not alike. Atomic number is the number of protons in the nuclei of the atoms of an element. Each element has a unique atomic number. Atomic mass is the combined masses of the protons, neutrons, and electrons of the atoms of an element. Individual isotopes of an element have specific mass numbers, which are the sum of the protons and neutrons in the nuclei of the atoms of the isotope.
atomic mass is the no. of protons+no. of nuetron
Simple: the atomic weight expressed in grams. Example for dysprosium - 162,500 grams.
The atomic mass of an element tells you how heavy its atoms are compared with atoms of other elements. Atomic mass is the average mass of an atom of an element, taking into account all its isotopes and their abundance.
The gram atomic weight or gram Atomic Mass of a chemical element is the mass in grams of Avogadro's number of atoms of the element with the isotopic proportions found in nature.
Atomic number is the number of protons in the nuclei of the atoms of an element. Atomic number is unique to each element. Atomic Mass is the combined mass of the protons, neutrons, and electrons in an atom of an element.
The atomic mass of an atom is the mass of 6.011 X 10^23 atoms of that element.
isotope
Because the gram atomic mass of an element is the mass in grams of Avogadro's Number of atoms. To find the actual mass of a single atom, the gram atomic mass must therefore be divided by 6.022 X 1023.
Generally, yes. However, isotopes are each of two or more variant of an element and will contain the same number of protons, but different numbers of neutrons. Therefore they will have different masses.