PH của 800 ml dd chứa 0,548 g Ba(OH)2 :
A. 2
B. 12
C. 0,4
D. 13,6

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

bcde is the incorrect answer it is a

you gotta add the following molecules so we can give u an answer

explanation: