How many protons does an atom of cobalt have?
A) 27
B) 29
C) 32
D) 59
How many neutrons does an atom of cobalt have?
A) 27
B) 29
C) 31
D) 59
Which of the following is not a property of most metals?
A) solid at room temperature
B) have luster
C) conduct heat and electricity well
D) are often found in the gas phase