Question

Check whether the following statements are true or false. Correct the false statements.1.The elements belonging to the same period have same properties throughout.2.Acid-base indicator is used to find the acidic or basic nature of the substances.3.Lithium,sodium and potassium are metals of the same group,but different period.4.About a half test tube of lemon juice (ph 5) is added to about half test tube of lime water (pha 10).The ph of the resultant solution is expected to be 7. 5.Mendeleev arranged elements based on atomic number.​

Answer 1

Answer:

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1) True

2) True

3) True

5) False, Mendeleev arranged the elements based on atomic mass

the 4th question is not clear