No element has the symbol J. It's the symbol for the energy unit joules, though.
The symbol used to show a transfer of energy is an arrow pointing from the energy source to the recipient of the energy. It typically represents the direction of the energy flow between the two entities.
kilo joules are used but sometimes calories are also used.
'J' is 'Joules' of energy, be it mechanical, heat, electric etc., Named after James Joule a Staffordshire, England , chemist. The basic S.I. units of the J (Joule) are 'kg*m^(2)s^(-2), somtimes written as kg(m/s)^(2) kJ (kilo Joules)= thousands of Joules ( of energy). e.g. 1000 J = 1 kJ
joules or kilo-joules
calories and joules
the basic is 'J' however in si units it is 'N m'
Joules are the metric units used to measure energy. When you are working with any form of energy you state them in joules.
10 joules of work in 1 second
Calories (1 dietary calorie, symbol Cal, is equivalent to 1000cal) are commonly used to measure energy in food. In some countries, joules are used instead. For scientific purposes, the joule (an SI unit) is preferred.
Depends on the type of calorie you're asking about. A "small calorie" which uses the symbol 'cal' is equivalent to about 4.18 Joules. A "large calorie" which uses the symbol 'Cal' is equivalent to about 4.18 Kilo Joules.
joules