Which elements are metals? check all that apply. rhenium (re) boron (b) lithium (li) krypton (kr) phosphorus (p) mercury (hg)?

ANSWER

Lithium, rhenium , mercury , are metals out of given five elements.

As lithium is a alkali metal , rhenium and mercury both are transition metals.

based on the electronic configurations of the metals , they have valence electrons present in their valence shell  which are easily available for donation so that they can attain stable electronic configuration and thus they are considered as metals.

boron is a non metal which is the member of group 13 of the periodic table.

krypton is a noble gas which is a member of group 18 of the periodic table.

phosphorus is a non metal member of group 17 of the periodic table.

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.