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Answer:
The correct answer is option 3 = group 13
Explanation:
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In the periodic table the groups are vertical and the horizontal periods. The elements of group 13 such as Aluminum (Al), Boron and others. These elements have 3 valence electrons. Element X needs to have 3 valence electrons since Br accepts an electron and there are 3 bromine.
The correct answer is option 3 = group 13
Answer:
Conservation of mass can be checked in an experiment . There are three steps to do it in a best way:
1. Weigh all the equipment and materials required in the experiment before the experiment.
2. Avoid spillage and evaporation during the experiment.
3. Weigh all the equipment and materials after the experiment.
If the mass is conserved then weight from step 1 is equal to weight from step
As you move down a group, first ionization energy decreases. Electrons are further from the nucleus and thus easier to remove the outermost one
Answer:
Sunlight, Soil, Rocks, Temperature and dead deer
Explanation:
You could say the dead tree is now an abiotic factor because biotic factors refer to living things