Question

How many protons, neutrons and electrons are there in a neutral Cesium atom?

55 protons, 78 neutrons, 55 electrons

69 protons, 100 neutrons, 69 electrons

37 protons, 37 neutrons, 45 electrons

43 protons, 65 neutrons, 43 electrons

Answer 1

A neutral cesium atom has 55 protons, 78 neutrons, and 55 electrons. The atomic number of cesium is 55, which is equal to the number of protons and electrons, while the mass number minus the atomic number gives the number of neutrons.

Step-by-step explanation:

In a neutral cesium atom, the number of protons, neutrons, and electrons can be determined by looking at its atomic number and mass number. Cesium has an atomic number of 55, which tells us there are 55 protons in its nucleus. Since the atom is neutral, it must also have 55 electrons to balance the positive charge of the protons, as negative and positive charges of equal magnitude cancel each other out. The most common isotope of cesium has a mass number of 133 (Cs-133). The mass number is the sum of protons and neutrons; therefore, it has 133 - 55 = 78 neutrons. Hence, a neutral cesium atom typically contains 55 protons, 78 neutrons, and 55 electrons.

Answer 2

55 protons, 78 neutrons, 55 electrons

Step-by-step explanation:

In a neutral Cesium atom we have 55 protons, 78 neutrons and 55 electrons. This can be found on the periodic table of elements.

Protons are the positively charged particles within an atom

Neutrons do not carry any charges.

Electrons are the negatively charged particles.

The amount of these subatomic particles can be obtained from the periodic table of element.

For a neutral atom, the number of protons and electrons are the same.

Since the atomic number is 55, it is also the number of protons in the atom.