C. sodium chloride but i could be wrong, someone correct me if i am
Answer:
Option C is correct : Calcium and magnesium are alkaline earth metals.
Explanation:
From the given option C is correct.
Calcium and magnesium are alkaline earth metals. Both are present in group 2. Each have 2 valence electrons.
All other options are incorrect, because:
a) Chlorine and iodine are alkali metals.
Chlorine and iodine are not alkali metals. These are halogens. Both have seven valence electrons and form salt with alkali metals.
B) Potassium and phosphorus are in the same group.
Potassium and phosphorus are not present in same groups. Potassium is present in group 1 and phosphorus is present in group 15.
d) Boron and silicon are present in same period.
Boron and silicon are not present in same period. Boron is present in period 2 while silicon is present in period 3.
e) Lead and tin both are non metals.
This option is also incorrect because lead and tin both are metals.
Thus, only option C is correct.
Answer: When baking soda and vinegar are combined, a new substance is produced. The carbon dioxide gas soon foams up in the mixture. Carbon dioxide, water, and sodium acetate are generated when sodium bicarbonate and acetic acid react.As Kobe adds additional baking soda and vinegar, the reaction will also become stronger.
Explanation: <em>well to be completely honest I don't see any answer choices so I'm going to assume that this is a writing question</em>
<span>The electronic configuration of cobalt is :1s2 2s2 2p6 3s2 3p6 3d7 4s2 </span>
Answer:
it means that things people come up with can be tested and they can turn it into the truth or in another sense figure out if its true or not
Explanation:they can figure out if its real or not and or turn it into the facts from what people make up and or think so and so is this or that and they can find out the truth