And here's another one againnn, help me HUHUHU, I'm really exhausted rn (only for those who know the answer) I need explanation for your answers, even though it's multiple choices, I still need your explanation for it.

DUE LATER!! :(:(:(:(

If your answer is NONSENSE it will be deleted as soon as possible!

But if your answer is CORRECT, HELPFUL, HAS AN EXPLANATION, I'll chose your answer as the BRAINLIEST ANSWER!​

1. (c)

2. (a)

3. (c)

4. (b)

5. (d)

1. (a)

2. (b)

3. (c)

Explanation:

OBSERVATION TYPE :-

1. The elements can be divided into 3 major groups metals, non- metals and metalloids. The rest of the options are also the names of some groups yet fail to be then correct answer. If you were asked to define 18 groups that exist in the periodic table then you'd have selected them. (r u getting me?)

2. Group 1 elements are known as alkali metals

3. Group 2 elements are called alkaline earth metals

4. Group 13 is called Boron Family

5. These are non-metals

i'd have selected Nobel gases had not Hydrogen been there. Excluding Hydrogen all are nobel gases.

CONCLUSION :-

1. The modern periodic table groups the elements into vertical columns, groups, and horizontal rows, groups.

2. Since the question is asking the harmful changes in metals that take place upon reacting with acids, it'll be option (b). as the metals corrode upon being treated with acids which is not of good use to us. the last two options talk bout the uses of this process which wont be "harmful", so the answer is only option (b)

3. Protective layering of various metals like Zn, Al helps prevent corrosion in metals.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added