Researchers at the University of Oklahoma have developed a breakthrough method of adding a single nitrogen atom to molecules, ...

For example, the atomic number of sodium is 11. Every sodium atom has 11 protons and 11 electrons. It has 11 positive charges and 11 negative charges. The mass number of an atom is its total ...

It arranges all natural and synthetic elements by their atomic number , ranging from 1 to 118 ... pure substances made from a ...

(Z is the atomic number of the nucleus. The atom still has only one electron, but a nucleus bigger than hydrogen's is included for generality. α is the fine structure constant.) Although it was ...

they kept seeing that the atomic number (number of protons in the nucleus, equivalent to the positive charge of the atom) was less than the atomic mass (average mass of the atom). For example ...

DC's Justice League Unlimited spinoff series The Atom Project has a solid premise but a somewhat clumsy debut.

Raising the energy state of an atom's nucleus using a laser, or exciting it, would permit the development of the most accurate atomic clocks ... to undergo a certain number of oscillations.

For experiments that require ultra-precise measurements and control over atoms -- think two-photon atomic clocks, cold-atom interferometer sensors and quantum gates -- lasers are the technology of ...

Nickel is a metal in group VIII of the periodic table with atomic number 29, an atomic weight of 58.71, and a density of 8.9. It has a melting point of 1453 C. The electronic configuration for the Ni ...

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

Silicon is a semiconductor in group IVA of the periodic table with atomic number 14, an atomic weight of 28.086, and a density of 2.33 Mg/m 3. It melts at 1410 C. The electronic configuration of the ...

For example, the atomic number of chlorine is 17. Every chlorine atom has 17 protons and 17 electrons. It has 17 positive charges and 17 negative charges, meaning that it is neutral overall.