Hey there! Here is the answer:
B.) decrease; increase
Here's why:
As you move from left to right across a period on the periodic table the size of an atom will decrease. As you move from top to bottom down a group on the periodic table the size of an atom will increase.
I really hope this answer helps you out! :)
3.07g H2
27.4/26.98/2x3x1.01x2=3.07
Answer:
itd be B because the melting point is 29.76 no matter the size
Explanation: