Classify the reactions as endothermic or exothermic.
the reaction between
ammonium nitrate and
water absorbs heat
from the surrounding
environment.
three drops of concentrated
sulfuric acid added to 100
milliliters of water in a beaker
makes the beaker hot.
ammonium chloride dissolved
in a beaker of water makes the
beaker cold.
uranium atoms are split to
produce nuclear energy.
water separates into
hydrogen and oxygen
when an electric current
is run through it.
methane and oxygen are
combined to produce
methanol and heat.
endothermic reaction
exothermic reaction

the movement of aircraft through clouds can even cause lightning strikes. a single lightning event is a "flash", which is a complex, multi-stage explosively ejected.

explanation:

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i have no clue hope you find the answer

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.

its b it was a compound