Question 1
An atom of nitrogen has 7 protons and 8 neutrons in its nucleus. Determine which statement correctly describes this atom.
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Chemistry · Unit 1 · Properties and structure of atoms · Atomic structure
Discriminate between the terms atomic number (Z), mass number (A) and isotopes of an element.
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Question 2
A sample of carbon contains atoms with mass numbers of 12 and 14. Both forms have an atomic number of 6. State the atomic number (Z) and mass number (A) for carbon-12, and explain whether carbon-12 and carbon-14 are isotopes.
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Question 3
An element X has three naturally occurring isotopes. Isotope-1 has 28 protons and 30 neutrons. Isotope-2 has a mass number of 60 and contains 32 neutrons. Isotope-3 is represented as $^{62}_{28}\text{X}$. Determine which statement correctly discriminates between atomic number, mass number and isotopes for element X.
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