Which of these changes do not involve forming or breaking chemical bonds?

a.
burning and melting

b.
rusting and cutting

c.
burning and digesting

d.
boiling and melting

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.

Fossil fuels are organic compounds that are made from

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.