A fuel mixture used in the early days of rocketry consisted of two liquids, hydrazine (n2h4) and dinitrogen tetroxide (n2o4) which ignite on contact to form nitrogen gas and water vapor.

your answers are a,b,,e and f

i hope this

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

the answer is c i took the test

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.