ve reasons.
a) Melting ice is a physical change.
(b
) Burning sugar is a chemical change.
(6
2) Shell of an atom is positively charged.
Nucleus of an atom is negatively charged.
nswer these questions:
ito ito properties
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Answer:
a) As an ice cube melts, its shape changes as it acquires the ability to flow. However, its composition does not change. Melting is an example of a physical change .
b) Burning a sugar cube is a chemical change. Fire activates a chemical reaction between sugar and oxygen. The oxygen in the air reacts with the sugar and the chemical bonds are broken.
c) An atom consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral.
Explanation:
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