i think the answer is 9 i dont really know my friend told me
Overview of Cobalt Atomic Number:27 Group: 9 Period: 4 Series: Transition Metals
Co
Cobalt, is in the metal family. The atomic number for the element of cobalt, (word steaming from the German meaning for evil spirit, and goblin) is twenty seven.
Cobalt is a metallic element. Mass number of it is 58.
The oxidation number of a Cobalt (III) ion is +3. This means that the Cobalt atom has lost three electrons.
Overview of Cobalt Atomic Number:27 Group: 9 Period: 4 Series: Transition Metals
No. Cobalt is in period 4, but iridium is in period 6.
Co
Yes, Cobalt is in Group 9, Period 4 on the periodic table, with an atomic number of 27, just above iron 26. Very definitely a metal.
The number of neutrons in any element is equal to mass number - atomic number. So,number of neutrons in cobalt is = 58 - 27 = 32. therefore, number of neutrons in cobalt is 32.
The atomic number of Cobalt is 27.
Cobalt, is in the metal family. The atomic number for the element of cobalt, (word steaming from the German meaning for evil spirit, and goblin) is twenty seven.
Cobalt is a metallic element. Mass number of it is 58.
The Pantone reference number for cobalt blue is Pantone 286 C.
The oxidation number of a Cobalt (III) ion is +3. This means that the Cobalt atom has lost three electrons.
Cobalt
The most common oxidation number is +II. The charge and number for cobalt is +2.