Answer: Option (d) is the correct answer.
Explanation:
The atomic number of Al is 13, so the electronic configuration of is as follows.
=
= [Ne]
The atomic number of Sc is 21, so the electronic configuration of is as follows.
=
= [Ar]
The atomic number of As is 33, so the electronic configuration of is as follows.
=
= = [Kr]
The atomic number of Ga is 31, so the electronic configuration of is as follows.
=
=
Therefore, we can conclude that galium (Ga) ion does not have a noble gas configuration in its ground state.
A species whose oxidation number increases in a reaction is oxidized (reducing reagents or reactant).
For example, balanced chemical
reaction: 2KClO₃ → 2KCl + 3O₂<span>.
</span><span>Oxygen in the
reactant state has oxidation number -2 (+1 + 5 + 3 · x = 0) and it is
oxidized to 0 (in molecule of oxygen) in the product state.</span>
Answer:
Filling in the blank, this is an example of <u>chemical weathering</u> which happens <u>to rocks</u> overtime.
Explanation:
Chemical weathering occurs when rocks are disintegrated by chemicals.
Rain water becomes acid rain when it reacts with carbon dioxide in the atmosphere (to form carbonic acid, HCO3).
When acidic rainwater falls and stays on rocks, chemical reactions take place with the minerals present in the rock, causing the rock to weather.
Areas with immense carbon dioxide and sulphur dioxide pollution increases rain water acidity, which in turn causes moisture in the atmosphere to dissolve these gases and produce acid rain.