stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Periodic Table Flashcards | StudBud
Periodic Table
1 / 22
Why did Mendeleev leave some question marks in his table?
A
He predicted they would find an element there.
B
He was trying to confuse his friends.
C
He could not find those cards.
D
He was not sure what to put there.
Next
0
0
correct · 0:00
