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Constructed Response . Topic 3: Atomic Structure

Set C: Subatomic particles

Base your answers to questions 7 through 9 on the information below.

In the modern model of the atom, each atom is composed
of three major subatomic (or fundamental) particles.
Write your answers here.

7. Name the subatomic particles contained in the nucleus. 7.

8. State the charge associated with each type of subatomic 8.

particle contained in the nucleus of the atom.

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9. What is the sign of the net charge of the nucleus? 9.

Set D: Isotopes, atomic mass calculation

Base your answers to questions 10 through 12 on the data table below, which shows three isotopes of

neon.
Atomic Mass Percent Natural Abundance
Isotope
(atomic mass units)
20
Ne 19.99 90.9 %
21 Ne 20.99 0.3 %

21.99
22 Teacher Preview Copy
8.8 %
Ne

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10. Based on the atomic mass and the natural abundances 10.

shown in the data table show a correct numerical set-up

for calculating the average atomic mass of neon.

11. Based on natural abundances, the average atomic 11.

mass of neon is closest to which whole number?

12. In terms of atomic particles, state one difference 12.

between these three isotopes of neon.

Set E: Electron configuration, number of subatomic particles

Base your answers to questions 13 and 14 on the information below.

An atom has an atomic number of 9, a mass number of 19, and electron configuration of 2 – 6 – 1 .

13. Explain why the number of electrons in the second and 13.

the third shells show that this atom is in an excited state.

14. What is the total number of neutrons in this atom? 14.

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