Question

exercise summary of atomic composition
how many electrons, protons, and neutrons are there in an atom of ²⁴⁰pu?
240 x protons
x neutrons
x electrons
recheck next (1 of 3) show approach
2nd attempt
incorrect
in a neutral atom, the number of protons and electrons is the same as the atomic num
number = # protons = # electrons. mass number = # protons + # neutrons. the mass n

Explanation:

Step1: Find atomic number of Pu

Plutonium (Pu) has an atomic number of 94. In a neutral atom, number of protons = number of electrons = atomic number. So number of protons = 94 and number of electrons = 94.

Step2: Calculate number of neutrons

The mass - number of the given Pu atom is 240. Using the formula Mass number = number of protons+number of neutrons. We can find number of neutrons as number of neutrons=Mass number - number of protons. So number of neutrons = 240 - 94=146.

Answer:

Protons: 94
Neutrons: 146
Electrons: 94