Name 2 scientists that helped to come up with the modern periodic table and their contributions

Mendeleev's

Explanation:

Mendeleev's Periodic Table. Mendeleev, who first published his periodic table in 1869 (Figure 3.2. 1), is usually credited with the origin of the modern periodic table.

Contributions made by Antoine-Laurent de Lavoisier, Johann Wolfgang Döbereiner, John Newlands, Julius Lothar Meyer, Dmitri Mendeleev, Glenn T.

Antoine-Laurent de Lavoisier: wrote Traité Élémentaire de Chimie (Elementary Treatise of Chemistry), which is considered to be the first modern textbook about chemistry.

Johann Wolfgang Döbereiner: German physicist began to formulate one of the earliest attempts to classify the elements. In 1829, he found that he could form some of the elements into groups of three, with the members of each group having related properties. He termed these groups triads.

Explanation:

the answer is a. co2, this would be colder than the : )

explanation:

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i