How many rows and columns are in the modern Periodic Table?
A. 18 columns and 7 rows
B. 12 columns and 9 rows
C. 7 columns and 18 rows
D. 25 columns and 15 rows
A. 18 columns and 7 rows
B. 12 columns and 9 rows
C. 7 columns and 18 rows
D. 25 columns and 15 rows
A. 1915
B. 1916
C. 1917
A. increases
B. decreases
C. increases at high temperatures and decreases at low
D. decreases at high temperatures and increases at low » Read More…
A. 1906
B. 1907
C. 1908
D. None of these
A. 4 Oct 1957
B. 4 Nov 1957
C. 4 Dec 1957
D. None of these
A. Jupiter
B. Saturn
C. Uranus
D. Venus