How do you calculate the relative atomic mass of isotopes? How can the atomic mass be a decimal? There are three isotopes of silicon. They have mass numbers of 28, 29 and 30. The …

How did Dmitri Mendeleev contribute to the atomic number? How is the atomic number affected by gamma decay? How is the atomic number different from atomic mass? How is the atomic …

What number of magnesium ATOMS are contained in a #12*g# mass of the metal?

The atomic mass of hydrogen is 1.09 u. > The relative atomic mass is a weighted average of the individual atomic masses. That is, we multiply each isotopic mass by its relative importance …

May 15, 2017 · 36 neutrons. One way we have of differentiating between various nuclides of the same element is by writing the name of the element followed by a hyphen and the mass …

20gmol^-1 Protons and Neutrons both have a RELATIVE atomic mass of 1gmol^-1. Electrons are considered to have no RELATIVE atomic mass and thus the overall relative atomic mass of an …

How does the number of valence electrons change from left to right across the periodic table? How many valence of electrons does potassium have? How do you calculate the number of …

How do you calculate the Ionization energy of Hydrogen? Why do dry sodium chloride and the solutions of sodium nitrate and sodium chloride all impart the same color to the flame? What is …

The atomic number is the number of protons in the nucleus so is different for each element. E.g helium is written #""_2^4He#. The bottom number is the atomic number, also known as the …

You use the atomic number. The atomic number always tells you the number of protons an atom has. For example, the element boron has an atomic number of 5. This means that all boron …