[Xe] 6s24f145d4
[Xe] 5p6 6s2 4f12
(Xe)6s24f145d4
[Xe] 6s^2 4f^14 5d^4
Some properties of helium are: Helium is a gas, a natural chemical element. The natural isotope 4He has 2 protons and 2 neutrons. The natural isotope 3He has 2 protons and 1 neutron. The number of electrons is identical - 2. - Atomic number: 2 - Atomic weight: 4,002602(2) - Electron configuration: 1s2 - Density: 0,1786 g/L - Melting point: -272,2 0C - Boiling point: -268,928 0C - Radius of the atom (covalent): 28 pm - First ionization energy: 2372,3 kJ/mol - Sound speed: 972 m/s - Thermal conductivity: 0,1513 W/m.K - No color - No odor
W this is the chemical symbol and is acceptable as a shorthand answer
long hand: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p2 Short hand: [Kr] 5s2 4d10 5p6 *Remember the numbers after the letter is written as an exponent*
(Xe)6s24f145d4
[Xe] 5p6 6s2 4f12
The element tungsten (symbol W, atomic number 74) has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d4 and the abbreviated noble gas form [Xe] 4f14 5d4 6s2
[Xe] 6s^2 4f^14 5d^4
[Xe] 6s^2 4f^14 5d^4
W. V. Noble has written: 'Interviewing'
Some properties of helium are: Helium is a gas, a natural chemical element. The natural isotope 4He has 2 protons and 2 neutrons. The natural isotope 3He has 2 protons and 1 neutron. The number of electrons is identical - 2. - Atomic number: 2 - Atomic weight: 4,002602(2) - Electron configuration: 1s2 - Density: 0,1786 g/L - Melting point: -272,2 0C - Boiling point: -268,928 0C - Radius of the atom (covalent): 28 pm - First ionization energy: 2372,3 kJ/mol - Sound speed: 972 m/s - Thermal conductivity: 0,1513 W/m.K - No color - No odor
W. C. Noble has written: 'Safe handling of microorganisms'
Before : One electron in the valence shell After reaction w/ Cl gas: none electron in the valence shell
The noble gasses are all elements in the last group in the Periodic Table, starting w/ helium ending w/ radon
W this is the chemical symbol and is acceptable as a shorthand answer
long hand: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p2 Short hand: [Kr] 5s2 4d10 5p6 *Remember the numbers after the letter is written as an exponent*