Problem: The isotope of an unknown element, X, has a mass number of 79. The most stable ion of this isotope has 36 electrons and has a 2- charge. Which of the following statements is(are) true? For the false statements, correct them.a. This ion has more electrons than protons in the nucleus.b. The isotope of X contains 38 protons.c. The isotope of X contains 41 neutrons.d. The identity of X is strontium, Sr.

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We’re being asked to determine which of the following statements is(are) true


An element can be represented as:


You can determine the identity of the element using its atomic number:

Atomic number (Z): 

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Problem Details

The isotope of an unknown element, X, has a mass number of 79. The most stable ion of this isotope has 36 electrons and has a 2- charge. Which of the following statements is(are) true? For the false statements, correct them.

a. This ion has more electrons than protons in the nucleus.
b. The isotope of X contains 38 protons.
c. The isotope of X contains 41 neutrons.
d. The identity of X is strontium, Sr.

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