Question

In 1869, Mendeleev created a periodic table in which elements were ordered by weight and placed in groups based on their chemical properties. Mendeleev's decision to design the periodic table in this way allowed immediate advances in chemistry by.?
A.) Providing an explanation for the reactive properties of the alkali metals
B.) Providing a framework for models of electron configurations
C.) Predicting the existence of a group of undiscovered inert gases
D.) Predicting the properties of undiscovered elements in specific atomic weight ranges.
PLEASE EXPLAIN

Answer 1

Answer:

D

Explanation:

Elements propreties can be undestood by analisying of its electronic configuration, because the way that electrons fill up the orbitals will determine the atomic reactivity.

The periodic table is made in a way that elements with the same electronic configuration are at the same group, so this desing in its early stage were able to predict the properties of undiscovered elements, because of the periodic trends within the periodic table.

Answer 2

D he predicted 3(?) new element that we're later discovered