jahnoibenjamin
19.07.2019 •
Chemistry
Number that indicates how many electrons an atom must gain lose or share to become stable
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Ответ:
Ответ:
Ionic charge
Explanation:
Group1- 1+
Group2- 2+
Group13- 3+
Group15- 3-
Group16- 2-
Group17- 1-
That's thier ionic charge
Ответ:
The correct answer is option (d).
Explanation:
Humus is component of the soil formed from the decomposition of dead plants (leaves, flower, roots. stems etc)and animal matter by the action of micro-organism. This makes the soil nutrient rich and fertile for plants.
Hence, the correct answer is (d).