Question

1. Who proposed the Periodic Law? State the law.

2. Name two elements whose atomic masses were corrected by Mendeleev.

3. What are Eka-boron, Eka-aluminium and Eka- silicon presently known as?

4. Write the group number in the Modern Periodic table to which the following belong:

i) Chalcogens

ii) Halogens

iii) Alkali metals

iv) Alkaline earth metals

v) Noble gas

vi) Lanthanides.

5. Who proposed the Modern Periodic Law? State the law.

6. State the number of valence electrons and also the valency of elements of Group 17.



PLEASE ANSWER ASAP.
PLEASE​

Answer 1

Answer:

I do know only the 3 question

they are scandium, gallium, germanium respectively.

Answer 2

Answer:

1. The Periodic Law. The periodic law was developed independently by Dmitri Mendeleev and Lothar Meyer in 1869. Mendeleev created the first periodic table and was shortly followed by Meyer. They both arranged the elements by their mass and proposed that certain properties periodically reoccur.

2.Gold and platinum are the two elements whose "atomic weights" were corrected on the basis of their position in "Mendeleev's periodic table".

3.Eka boron is The element Scandium. Eka aluminum is the element Gallium. Eka silicon is the element Germanium.

5.The Periodic Law. The periodic law was developed independently by Dmitri Mendeleev and Lothar Meyer in 1869. Mendeleev created the first periodic table and was shortly followed by Meyer. They both arranged the elements by their mass and proposed that certain properties periodically reoccur.

6.Each hydrogen atom has one valence electron and is univalent.

sorry about that, please check the group numbers from the periodic table, if you like these answers so please mark it as brainlist...