determining the properties of cesium\nthe atomic number of cesium (cs) is 55. if an atom of cesium has 78…

determining the properties of cesium\nthe atomic number of cesium (cs) is 55. if an atom of cesium has 78 neutrons, what is the atomic mass of cesium?

determining the properties of cesium\nthe atomic number of cesium (cs) is 55. if an atom of cesium has 78 neutrons, what is the atomic mass of cesium?

Answer

Answer:

133

Explanation:

Step1: Recall atomic - mass formula

Atomic mass = Protons + Neutrons

Step2: Identify number of protons

Atomic number = Number of protons. For cesium, atomic number = 55, so protons = 55.

Step3: Calculate atomic mass

Atomic mass = 55+78 = 133