It is an example of physical change. The molecules are not changing, so it is not chemical, and a physical property is something that a physical thing has.
Answer: A
Explanation: the only way to turn it from blue to yellow is to mix it with an acidic solution.
Answer:
Iron has 30 neutrons.
A neutral iron atom contains 26 protons, 30 neutrons, plus 26 different shells around the nucleus.
Explanation:
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Should be :
Lead Sulfate Tetrahydrate
Answer:
Electron cloud
Explanation:
The electron cloud is an informal term in chemistry and physics. This region describes the negatively charged electrons in their orbit surrounding the nucleus in an atom. The nucleus has protons in it that have a positive charge on it. It is not easy to know where exactly an electron in any specific time but the electron cloud helps to know electron is moving in this specific area.
