Question

How many neutrons are in Cesium-130 (Cs)? 185 130 75 55

Answer 1

Answer:

78

Name Cesium

Atomic Mass 132.9054519 atomic mass units

Number of Protons 55

Number of Neutrons 78

Number of Electrons 55

Answer 2

The number of neutrons in Cesium-130 is 75.

Explanation:

• An isotope of cesium (Cs) represented as Cs-130 has the same atomic number 55.
• The mass number of this isotope is different from another isotope as isotopes have the same atomic number but different mass numbers.
• Therefore, the number of protons in isotopes also remains the same but the number of neutrons is different.
• As the atomic number is 55, the number of protons will also be 55.
• The mass number is the sum of the number of protons and the number of neutrons.
• Therefore, the number of neutrons can be given as:

        $\[neutrons = 130 - 55\]$

        $\[neutrons = 75\]$

• Thus, the number of neutrons in Cesium-130 is 75.