Tell me whats wrong in this 1. Titanium is a transition metal and gallium is a transition metal.
2. Nitrogen is a nonmetal and oxygen is a nonmetal. Nitrogen is in group 5A (15), and oxygen is in group 6A (16).
3. Lithium is a main group metal and sodium is a main group metal. Lithium is in group 1A (1), and sodium is in group 1A (1).
4. Argon is a nonmetal and bromine is a nonmetal. Argon is in group 8A (18), and bromine is in group 7A (17).
5. Germanium is a metalloid and arsenic is a metalloid. Germanium is in group 4A (14), and arsenic is in group 5A (15).

Gallium is NOT a transition metal.

Explanation:

1. Titanium is a Transition metal However Gallium is NOT. Gallium is a main group metal, It belongs to group 3 - Boron Group.

All the remaining statements are correct.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.