The atomic number of helium (He) is 2. The atomic weight of He is 4.002602 grams per mole.
Hydrogen has atomic number 1 whereas helium's is 2.
The atomic number of fluorine is 9.The atomic number of sodium is 11.
Atomic number= number of protons. Hydrogen atomic number=1
The atomic number is equal to number of protons in the atomic nucleus.
The number of protons is equal to the atomic number of an atom
Hydrogen has atomic number 1 whereas helium's is 2.
For the element Helium is its scientific name. For the bare nucleolus it is know as an alpha particle.
this elemnt has an atomic number that is double the atomic number of silicon?
the answer is that it is called a atomic number.
The atomic number is equal to the number of the protons in the atomic nucleus.
The element with an atomic number that is double the atomic number of silicon is germanium, with an atomic number of 32. Silicon has an atomic number of 14.
The element with an atomic number that is double the atomic number of silicon is germanium, with atomic number 32. Silicon has an atomic number of 14.
Most helium has a mass number of 4. The rare 3He isotope has a mass number of 3. The mass number is the integer total of protons and neutrons for a given isotope. For example radioactive carbon-14 has a mass number of 14, while carbon-12 (the most common stable form) has a mass number of 12.
Subtract the atomic number from the atomic weight.
Synthetic ElementsQuasi-synthetic elements:Technetium, atomic number 43Promethium, atomic number 61Astatine, atomic number 85Francium, atomic number 87Neptunium, atomic number 93Plutonium, atomic number 94Transuranium elementsAmericium symbol Am, atomic number 95Curium symbol Cm, atomic number 96Berkelium symbol Bk, atomic number 97Californium symbol Cf, atomic number 98Einsteinium symbol Es, atomic number 99Fermium symbol Fm, atomic number 100Mendelevium symbol Md, atomic number 101Nobelium symbol No, atomic number 102Lawrencium symbol Lr, atomic number 103Transactinide elements Rutherfordium symbol Rf, atomic number 104Dubnium symbol Db, atomic number 105Seaborgium symbol Sg, atomic number 106Bohrium symbol Bh, atomic number 107Hassium symbol Hs, atomic number 108Meitnerium symbol Mt, atomic number 109Darmstadtium symbol Ds, atomic number 110Roentgenium symbol Rg, atomic number 111Copernicium symbol Cn atomic number 112Provisional names of Recently observed synthetic elements:Ununtrium symbol Uut, atomic number 113Ununquadium symbol Uuq, atomic number 114Ununpentium symbol Uup, atomic number 115Ununhexium symbol Uuh, atomic number 116Ununseptium symbol Uus, atomic number 117.Ununoctium symbol Uuo, atomic number 118
The atomic number is the number of protons in a nucleus.
Atomic number= number of protons. Hydrogen atomic number=1