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Interestingly, nickel has a lower Atomic Mass (58.693) than cobalt (58.933), even though cobalt has a lower atomic number (27) than nickel (28).

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Which has the lower atomic mass cobalt or nickel?

Cobalt has an atomic mass of 58.933195(5) while nickel has an atomic mass of 58.6934(4). Nickel has the lower atomic mass.


Which has a lower atomic mass lead or cobalt?

Cobalt has a lower atomic mass than lead. The atomic mass of cobalt is approximately 58.93 g/mol, whereas the atomic mass of lead is about 207.2 g/mol.


Why is cobalt placed before nickel on the periodic table of the elements?

Cobalt comes first because it has fewer protons (27) and nickel has more (28). The atomic mass is not important in the modern periodic table (but that's all they knew in Mendeleev's day). The reason cobalt is heavier is because it has more NEUTRONS (32).


Why is co placed before ni on the periodic table?

Keep in mind that the atomic mass of an element is based on an average of relative abundance of stable isotopes. Nickel has several stable isotopes and Cobalt I believe has only one stable isotope. The weighted average proportionally to the relative abundance of the several Nickel isotopes is less than the average of Cobalt's isotope(s). So basically Though Nickel has a greater atomic number and the trend is for this to correlate with atomic mass because nickel exists in relatively large proportion as a lighter stable isotope Nickels average atomic mass is less than Cobalt's atomic mass. Google about relative abundance and calculating atomic mass to find all sorts of interesting things!


What is the atomic mass of nickel?

The atomic mass of nickel is 58.69. Nickel is a metal element.


What three pairs of elements are not order by atomic mass?

Three pairs of elements that are not ordered by atomic mass are: potassium (K, atomic mass ~39.1) and argon (Ar, atomic mass ~39.9), where potassium comes before argon in the periodic table; cobalt (Co, atomic mass ~58.9) and nickel (Ni, atomic mass ~58.7), where cobalt is placed before nickel; and iodine (I, atomic mass ~126.9) and tellurium (Te, atomic mass ~127.6), where iodine precedes tellurium. These examples highlight instances where the arrangement of elements does not strictly follow increasing atomic mass.


What is the atomic mass of a nickel?

Nickel is a meta element. Atomic mass of it is 59.


What is the atomic wheight of cobalt?

Cobalt is a meta element. Atomic mass of it is 59.


Which atomic mass is smaller cobalt or lead?

Cobalt (Co) has a smaller atomic mass than Lead (Pb). Cobalt's atomic mass is only 58.9332 while lead's is 207.2.


What is the atomic mass of colbat?

Cobalt is an atomic mass of 58.93 atomic mass units


What is the average atomic mass for cobalt?

The average atomic mass for cobalt is approximately 58.93 atomic mass units. It is calculated by taking into account the different isotopes of cobalt and their relative abundance in nature.


Does cobalt or lead have a less atomic number of mass?

On the periodic table, lead (Pb) has an atomic weight of 207.2, and cobalt (Co) has an atomic weight of 58.93320.