IT forms because they are highly reactive elements.
Answer: two elements and three atoms
Explanation:
An element is the simplest substance and hence cannot be broken down using chemical reactions.
Magnesium chloride 
is an ionic compound formed by the transfer of electrons from element magnesium (Mg) to element chlorine (Cl) where Magmesium forms a cation 
by losing two electrons and chlorine forms an anion 
by gaining electron.
There are 3 atoms in Magnesium chloride which include one atom of magnesium (Mg) and two atoms of chlorine (Cl).
Answer: The final temperature is equal to
45 Celsius
Explanation:
Explanation:
We have the amount of energy gain
Q
=
m
⋅
c
⋅
Δ
T
=
m
c
Δ
t
where
c
=
4.184
J
/
g
.
C
is the specific heat of water,
m
is the mass of water
⇒
840
=
10
x
4.184
⋅
(
t
−
25
)
t
=
840
10
x
4.184
+
25
=
45
i.e.
45
∘
C
A type of atom can be of any type. Elements are pure chemicals that cannot be converted into more basic compounds by conventional chemical processes.
A chemical element is a substance that cannot be disassembled chemically or physically into simpler substances. Chemical elements are the basic building blocks of matter because they are pure substances made up of atoms with the same atomic number (number of protons) in their nuclei. A chemical element is essentially a pure substance that cannot be disintegrated, degraded, or changed into other compounds through physical or chemical methods.
Learn more about Elements here-
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