Question

i) Describe the structure of the modern periodic table.
ii) Explain the terms with examples.
i) Endothermic reaction.
ii) Exothermic reaction.​

Answer 1

Answer:

1. The periodic table is organized like a big grid. Each element is placed in a specific location because of its atomic structure. As with any grid, the periodic table has rows (left to right) and columns (up and down). Each row and column has specific characteristics.

Explanation:

Endothermic and exothermic reactions are chemical reactions that absorb and release heat, respectively. A good example of an endothermic reaction is photosynthesis. Combustion is an example of an exothermic reaction. The categorization of a reaction as endo- or exothermic depends on the net heat transfer

Answer 2

Explanation:

Endothermic reaction: The reaction in which heat is absorbed is called endothermic reaction.

KNO3+H2O+Heat =KNO3(aq)

Exothermic reaction: The process in which heat is given out is called exothermic reaction.

NaOH+H2O=NaOH(aq)+heat

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