Branliest to correct answer

what evidence is there that work is being done?

a)
a lever is being used.

b)
a simple machine makes a task easier.

c)
the rock has a larger force than the boy.

d)
the boy uses force to move the rock a distance.

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent