The formula of a compound is 
Given:
The ions
and 
To find:
The formula for ions
and 
Solution:
The ion with a positive charge (cation) = nickel ion = 
The ion with a negative charge (anion) = nitrate ion = 
Valency on nickel ion = 2
Valency on nitrate ion = 1
Using the criss-cross method as shown in image
The formula of a compound : 
The name of a compound is nickel(II) nitrate

The formula of a compound is 
Learn more about ions here:
brainly.com/question/24389121?referrer=searchResults
Answer:
Temperature measures the average kinetic energy of the particles in a substance. Thermal energy measures the total kinetic energy of the particles in a substance. The greater the motion of particles, the higher a substance's temperature and thermal energy.
Explanation:
Hope it helps for you : )