An atom has subshells 
in the ground state. What is its atomic number?
A. 10
B. 18
C. 20
D. 30
E. More information is needed.
D. 30
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The Sun is a
a. moon. b. galaxy. c. planet. d. star.
In alpha decay,
A) a proton turns into a neutron B) a neutron turns into a proton C) a proton turns into an electron D) a helium nucleus is ejected
Consider the following processes: The temperature of two identical gases are increased from the same initial temperature to the same final temperature. Reversible processes are used. For gas A the process is carried out at constant volume while for gas B it is carried out at constant pressure. The change in entropy:
A. is the same for A and B B. is greater for A C. is greater for B D. is greater for A only if the initial temperature is low E. is greater for A only if the initial temperature is high
The image of an object at the focal point of a concave spherical mirror
a. looks the same as the object. b. is said to be formed at infinity. c. is real. d. is reduced.