Look at the diagram shown below. Name the scientist who created this early attempt at a periodic table. Group
1
IV
V
VI
Vi
VIR
H
LI
Be
B
C с
N
o
Na
Mg
A
Si
P
S
d
K
Са
?
Ті
V
Mn
Fe, Co,
NI, CU

Russian chemist Dmitri Mendeleev

Explanation:

Russian chemist Dmitri Mendeleev

the answer would be a

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.