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.
Oxygen has 8 electrons, so:
1s22s22p4.
There are two dots on two sides of the O symbol, and 1 dot on each of the other two sides.
See the related link for an illustration.
[He] 2s2 2p4
O2
1s2 2s2 2p4
H2o?
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 Oxygen is 8.
12.4
Cu
Oxygen come on now you breath it. :)
MassNumberAtomicSymbolAtomicNumber
11B
N2
it is Tc.
53 ..I 127
Carbon is taken as a standard. It replaced oxygen in 1961.
Why carbon is taken as standard value for atomic weight
That is the standard notation.
That is the standard notation.
That is the standard notation.
That IS the standard notation.
That is the standard notation.