Answer:
Number of protons = 52, Number of electrons = 52, Number of neutrons = 76
Explanation:
4 x 1000 so 4 kilometers are equal to 4000 meters
A mineral is a naturally occurring , solid, crystalline substance with a specific chemical composition. Minerals are usually inorganic and are formed by ionic, covalent or metallic bonding. Ionic bonds are the dominant type of bonds in mineral strictures. 90% of all minerals are ionic compounds. Minerals bonded by covalent bonds are strong, for example carbon bonded together to form diamond. Metallic bonds are a type of covalent bonds where the atoms have a strong tendency to lose electrons and pack together as cations.
It is A. Barium
Explanation: I did that already