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2. Atoms and the Periodic Table

Isotopes

2. Atoms and the Periodic Table

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Consider the following atoms in which X represents the chemical symbol of the element: (4.4, 4.5) ¹⁶₈X ¹⁶₉X ¹⁸₁₀X ¹⁷₈X ¹⁸₈Xc. Which atoms have the same mass number?

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Argon has three naturally occurring isotopes, with mass numbers 36, 38, and 40.c. How are they different?

Argon has three naturally occurring isotopes, with mass numbers 36, 38, and 40.b. How are these isotopes alike?

Argon has three naturally occurring isotopes, with mass numbers 36, 38, and 40.a. Write the atomic symbol for each of these atoms.

Consider the following atoms in which X represents the chemical symbol of the element: (4.4, 4.5) ¹⁶₈X ¹⁶₉X ¹⁸₁₀X ¹⁷₈X ¹⁸₈Xd. What atoms have the same number of neutrons?

Consider the following atoms in which X represents the chemical symbol of the element: (4.4, 4.5) ¹⁶₈X ¹⁶₉X ¹⁸₁₀X ¹⁷₈X ¹⁸₈Xa. What atoms have the same number of protons?

Indicate if the atoms in each pair have the same number of protons, neutrons, or electrons. (4.4, 4.5)c. ⁴⁰₁₈Ar, ³⁹₁₇Cl

Complete the following table for the three naturally occurring isotopes of silicon, the major component in computer chips: (4.4, 4.5)

For each representation of a nucleus A through E, write the atomic symbol and identify which are isotopes. (4.4, 4.5) Proton (red) Neutron (white)a.

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