An isotope with 22 neutrons and 18 protons is what?A) 18 42 A r { }_{18}^{42} \mathrm{Ar} 18 42 Ar B) 18 22 A r { }_{18}^{22} \mathrm{Ar} 18 22 Ar C) 18 40 A r { }_{18}^{40} \mathrm{Ar} 18 40 Ar D) 22 18 A r { }_{22}^{18} \mathrm{Ar} 22 18 Ar

Question

An isotope with 22 neutrons and 18 protons is what?A)    18 42 A r { }_{18}^{42} \mathrm{Ar} 18 42 ​ Ar B)    18 22 A r { }_{18}^{22} \mathrm{Ar} 18 22 ​ Ar C)    18 40 A r { }_{18}^{40} \mathrm{Ar} 18 40 ​ Ar D)    22 18 A r { }_{22}^{18} \mathrm{Ar} 22 18 ​ Ar

Zybrea Knight · Accepted Answer

Final Answer : C, Explanation :   The atomic number (number of protons) for Argon (Ar) is 18. The mass number is the sum of protons and neutrons, which is 18 + 22 = 40, making the correct isotope   18 40 A r { }_{18}^{40} \mathrm{Ar} 18 40 ​ Ar  .

An isotope with 22 neutrons and 18 protons is what?

A) $}_{18}^{42} \mathrm{Ar}$
B) $}_{18}^{22} \mathrm{Ar}$
C) $}_{18}^{40} \mathrm{Ar}$
D) $}_{22}^{18} \mathrm{Ar}$

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An isotope with 22 neutrons and 18 protons is what?A) 1842Ar{ }_{18}^{42} \mathrm{Ar}1842​Ar B) 1822Ar{ }_{18}^{22} \mathrm{Ar}1822​Ar C) 1840Ar{ }_{18}^{40} \mathrm{Ar}1840​Ar D) 2218Ar{ }_{22}^{18} \mathrm{Ar}2218​Ar

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Learning Objectives

Related questions

An isotope with 22 neutrons and 18 protons is what?

A) $}_{18}^{42} \mathrm{Ar}$
B) $}_{18}^{22} \mathrm{Ar}$
C) $}_{18}^{40} \mathrm{Ar}$
D) $}_{22}^{18} \mathrm{Ar}$