An element has an atmomic number of 68. the number of protons and electron in a neutral atom of the element are?

Explanation:

An element whose atomic number is 68 (number Z), has 68 electrons and 68 protons. According to the periodic table it corresponds to the element Erbium (Er), whose mass number (A) is 167. The number of neutrons is 167-68 = 99.

"electric potential difference is the difference in electric potential (V) between the final and the initial location when work is done upon a charge to change its potential energy. In equation form, the electric potential difference is.."

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Explanation:

https://www.physicsclassroom.com/class/circuits/Lesson-1/Electric-Potential-Difference