Iron (fe) has mixed atomic bonding. 55% metallic and 45% covalent. as it is heated it becomes more metallic and more covenant when cooled. based on this information explain the following. as iron is a) what happens to its ductility initially b) what happens to its conductivity initially? c) what happens to its toughness initially? d) as iron is heated red hot, the crystal structure changer from _cc to _cc g) does it contract or expand?

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

the answer is b. dilution