Condensation occurs when a gas comes into contact with a cold surface and transforms into a liquid. This transition occurs because the gas particles lose energy and their intermolecular forces draw them together. An example of this is when the warm breath condenses on a cold window.
When a gas reaches a cold surface, it experiences a phase transition known as condensation. During this process, the gas particles lose energy due to the low temperature, which slows down their motion and allows intermolecular forces to draw them closer together, thus transforming the gas into a liquid.
For instance, when you breathe on a cold window, the water vapor in your breath condenses on the glass surface into tiny liquid droplets. Similarly, when high atmospheric pressure forces a gas like carbon dioxide to transition into a liquid, it's known as condensation.
Deposition is a similar process where a gas transform directly into a solid, bypassing the liquid state. For example, the formation of frost is a result of deposition where water vapor turns directly into ice crystals. However, this phenomenon is different from the situation described in your question.
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So,
There are two basic types of changes in chemistry: physical changes and chemical changes.
Physical changes do not change the chemical identity of the substance; instead physical changes operate between molecules/atoms/ions/etc. Changes of phase and separation of different substances in a mixture are examples of physical changes. For example, when you change the phase of liquid water to gas, you are operating between the water molecules by breaking the intermolecular attractions. Yet you still have water, H2O. When you separate iron filings from a mixture of sand and iron filings with a magnet, you are, in a way, operating between the atoms of iron. Yet you still have iron and sand.
Chemical changes change the chemical identity of the substance. When you throw salt into water, the salt dissolves and is no longer salt. You get salt water, which is chemically different from water and salt. You have operated inside the salt compound.
Thus, changing matter from one form to another without a change in chemical properties would be a physical change.
b. cannot be broken down further.
c. are all composed of carbon.
d. have no mass.
Answer:
B
Explanation:
Atoms are those particles which cannot be broken down further. But, later on the subatomic particles were discovered
John Dalton's Atomic Theory states that atoms are indivisible and cannot be broken down further. They combine to form molecules and are not all composed of carbon. Atoms do have mass.
John Dalton, an English chemist, is famous for his theory of atomic structure, also known as Dalton's Atomic Theory. According to this theory, atoms are the tiniest particles of matter which cannot be divided or broken down further into simpler substances by chemical means. Thus, the correct answer to the question would be (b) - atoms cannot be broken down further.
Atoms can combine in various proportions to form molecules, but they themselves do not contain molecules. Also, not all atoms are composed of carbon, there are many other elements such as hydrogen, oxygen, nitrogen, to name a few. Finally, atoms do possess mass, it is one of their fundamental properties.
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i think 12000 is the answer