(A) 256:1
(B) 16:1
(C) 1:16
(D) 4:1
(E) 1:4
45 . What does X represent in the following nuclear reaction?
(A) β particle
(B) Positron
(C) α particle
(D) Neutron
(E) γ ray46 . When chromium metal is used to form K 2 Cr 2 O 7 , the oxidation state of chromium changes
from
(A) 0 to 4
(B) 3 to 6
(C) 2 to 6
(D) 0 to 6
(E) 2 to 447 . Electron density studies have revealed that X and Y have an equal number of electrons.
Which of the following could X and Y be?
(A) Ca+ and K
(B) H+ and He
(C) Cl and F
(D) O– and S+
(E) None of the above