We can represent atoms by listing the number of protons, neutrons, and electrons - for example 2p+, 2no , 2e- for helium. which of the following represents the 18o isotope of oxygen?
a. 7p+ , 2no , 9e-
b. 8p+ , 10no , 8e-
c. 9p+ , 9no , 9e-
d. 10p+ , 8no , 9e-

b. 8P+ , 10no , 8e-

Explanation:

An isotope is a form of a chemical element whose atomic nucleus of an element contains a specific number of neutrons and protons. For example, the nucleus of a carbon atom contains 6 neutrons(no) and 6 protons(P+) and similarly in the nucleus of oxygen contains 8 neutrons and 8 protons . The number of neutron can varies in the nucleus of that element. Variation in neutrons form isotopes of the element. In nature, oxygen has three stable isotopes, ¹⁶O, ¹⁷O, and ¹⁸O, but ¹⁶O most abundant. The ¹⁸O isotope of oxygen contains 8 protons(P+), 8 electrons(e-) and 10 neutrons(no) instead of normal 8 neutrons.  

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