The electron dot notion for oxygen is given by 6 dots indicating 6 electrons in the outer shell. Oxygen has 8 electrons, 2 present in the K shell and 6 in the L shell ready for accepting electrons.
The standard notation for copper is Cu.
12.4 in standard notation is written as 1.24 x 10^1.
The mass number is the sum of neutrons and protons in the atomic nucleus and is different for each isotope of any element. For example the isotope oxygen-16 has the mass number 16. The atomic weight of oxygen (not Atomic Mass) is [15,99903; 15,99977] after the IUPAC Tables - 2009. The atomic number of oxygen is 8.
The atomic number of an element refers to the number of protons in its nucleus. For oxygen (O), the atomic number is 8. So in O2 (oxygen molecule), each oxygen atom contributes its atomic number (8) to the total atomic number for the molecule.
Oxygen come on now you breath it. :)
The standard atomic notation for boron is ^10B.
MassNumberAtomicSymbolAtomicNumber
The standard atomic notation for potassium is K-39. This indicates that the element has a mass number of 39.
N2
it is Tc.
53 ..I 127
The standard atomic notation for an atom of argon with 20 neutrons and 18 protons is 38Ar.
The standard atomic notation for the sodium-23 atom is: Atomic number (number of protons) = 11 Mass number (sum of protons and neutrons) = 23 Symbol = Na Putting it all together: ^23Na
Beryllium is a solid metal at room temperature.
Beryllium for example would be. 7 2 Be 4 7= The mass number (+Protons and +/- neutrons added) 4 = The +protons 2 = The oxidation state. Beryllium would have 2 valance -electrons, hence the two. It has to lose 2 -electrons to be stable. For a metal it would be how many electrons it has to gain to be stable (Full valence shell). Be = Is obviously the symbol of the element.
Carbon is taken as a standard. It replaced oxygen in 1961.
Why carbon is taken as standard value for atomic weight