Question

the present system of representing chemical elements was suggested by fill in the blanks​

Answer 1

Answer:

$\\ { \bold{ \underline{Prove \: \: that} : - }}$

$\\ \: \: \: \: \: { \bold{ {e}^{x} = \left( \dfrac{ { \triangle}^{2} }{E} \right) {e}^{x} \left \{ \dfrac{E( {e}^{x} )}{ { \triangle}^{2}. {e}^{x} } \right \} }}$

• Here –

$\\ \: \: \: \: { \huge{.}} { \bold{ \: \: \triangle \: = forward \: \: operator }}$

$\\ \: \: \: \: { \huge{.}} { \bold{ \: \: E \: = Displacement \: \: operator }}$

• Don't give irrelative answers.

Answer 2

Answer:

.

Dmitri Mendeleev in 1897, public domain

Organizing Matter

In the mid-1700s, chemists began actively identifying elements, which are substances made up of just one kind of atom. But a century later, they still used a variety of symbols and acronyms to represent the different materials — there just wasn’t a common lexicon. In 1869, the Russian chemist Dmitri Mendeleev came to prominence with his tabular diagram of known elements. This basic ingredient list, of which all matter exists, became known as the periodic table. Here’s wh

Explanation:

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