How many protons does an atom of cobalt have?
27
29
32
59
Which of the following is not a property of most metals?
solid at room temperature
have luster
conduct heat and electricity well
are often found in the gas phase
Neutral lithium has three protons. During a chemical reaction, one electron is removed. How many protons does lithium have now?
3
2
1
You must know what element lithium reacted with to determine this.
