What is the difference between physical and chemical change in chemistry?

physical changes are those changes which can be reversed in their previous form like ice to water

chemical changes are those changes which cannot be reversed in their previous form

1. the change which are reversable are known as physical change

2.no new substance are formed

3.no change in chemical nature of the substance

4. example: • melting of ice

• tearing of paper etc.

1.this are irreversible this can't be reverse

2.new substance are formed

3.it results form a chemical reaction

4. example: • burning of wood

• rusting of iron etc.

hope it helps you :)

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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