Feb 5, 2017 · The presence of different numbers of neutrons for a given atomic number, explains the existence of isotopes, and the quoted atomic mass is the average of the individual isotopic masses.

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 number of the …

May 21, 2015 · This is because an electron changes the proton to one less so Iodine which has an atomic number of 53 will change to atomic number 52, which is Te. And of course the mass number …

All of these elements are mono-atomic gases, that rarely form chemical compounds, and then only with the most oxidizing elements, fluorine and oxygen.

Which one is true? A) The atomic weight must be a whole number. B) The mass number must be exactly twice the atomic number for each atom. A packet of energy is called ? a) a wavelength b) a …

Protons are positively charged, massive nuclear particles. And the number of protons in the nucleus defines Z, the atomic number, which specifies the identity of the element. I have written before that …

False, electronegativity is the ability to attract electrons. Electronegativity of an atom refers to its ability to attract electrons in a covalent bond, not repel them. electromagnetically of an atom depends on its …

1 u = 1.661 ⋅ 10−27kg In your case, you have 1.513 ⋅ 10−25kg ⋅ 1 u 1.661 ⋅ 10−27kg = 91.1 u The closest match to this value is zirconium, Zr, which has an atomic number equal to 40 and a relative …

Jul 15, 2017 · The elements are arranged in oder of the number of protons or atomic number, then put into vertical columns that reflect the similar chemical properties of the chemical families.

The atomic mass number refers to the approximate total mass of one atom of the element. That is, the total mass of the protons, neutrons, and electrons in the element. Since electrons have like 1/1837 …