Question

science kids: the periodic table of elements
madelyn roque

1. about how many elements have been discovered since mendeleev first created the periodic table of elements?

a. 10
b. 27
c. 40
d. 60
about how many elements have been discovered since mendeleev first created the periodic table of elements?
27
40
10
60

Explanation:

Mendeleev first published the periodic table in 1869. Since then, approximately 40 new elements have been discovered through various scientific research and experimental methods in the field of chemistry.

Answer:

C. 40