Physical change
iron nail have high melting point, thus, when it is heated, it will not melt very easily.
chemical change
iron nail can rust due to the exposure to the air(oxygen). iron in the nail and oxygen in the air will react together to form iron oxide(rust).
furthermore, the reaction is irreversible.
The bronsted-lowry definition views an acid-base reaction as a proton transfer reaction.
Johannes Nicolaus Brnsted and Thomas Martin Lowry independently developed the Brnsted-Lowry theory, also known as the proton theory , which states that any compound that can transfer a proton to another compound is an acid, and the compound that accepts the proton is a base.
A proton is a nuclear particle with a unit positive electrical charge; it is denoted by the symbol H+. Similar to how a substance can only act as a base when a acid is present, a substance can only act as an acid when a base is present. Additionally, an acidic material transforms into a basic when it loses a proton.
In addition, when a basic substance obtains a proton, it generates an acid known as the conjugate acid of a base, and when an acidic substance loses a proton, it forms a base known as the conjugate base of an acid.
Learn more about acid here;
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Where are the answer choices?
The answers are 6. A. Igneous
7.To determine past geography is to look at water lines. Many cliffs
contain "stained" waterlines on the surface of the rocks, which shows
that water at a certain level used to occupy that area.
8. B. Deposition
9.C.Metamorphic
10.C.Sedimentary
11.A. Deposition
12.A. Cooling magma or lava
Answer: 45
Explanation:
mass number = number of protons and neutrons
atomic number = number of protons
to find neutrons subtract atomic number from mass number
so 80 - 35 = 45 neutrons
