In the periodic table, the horizontal rows are called ________ and the vertical columns are called ________.
Fill in the blank(s) with correct word
Question 2
How much heat must be removed from steam to change it to liquid?
A) 540 cal/g
B) 600 cal/g
C) 830 cal/g
D) 1 kcal/g
E) 1.8 kcal/g