The Nucleus

Question 1

Identify the term being defined.strong electrostatic force✔ strong nuclear forcestrong centripetal forcegravitational attractions the force that keeps the nucleons bound inside the nucleus of an atom

Revolt · Accepted Answer

✔ strong nuclear force; the force that keeps the nucleons bound inside the nucleus of an atom: strong nuclear force; the amount of energy needed to split the nucleus into individual protons and neutrons: nuclear binding energy; the difference between the mass of the nucleons and the mass of the atom: mass defect

Question 2

Which items are directly related to radioactive decay?

Revolt · Accepted Answer

E = mc2; mass defect

Question 3

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force? Check all that apply.

Revolt · Accepted Answer

Nuclear binding energy is the energy needed to separate nuclear particles.; The strong nuclear force holds an atom’s protons and neutrons together.; Nuclear binding energy can be calculated using E = mc2.

Question 4

List three characteristics of chemical reactions and three characteristics of nuclear reactions.

Revolt · Accepted Answer

Chemical reactions: 1) Involve the loss, gain, or sharing of valence electrons. 2) The nucleus of the atoms remains unchanged. 3) They involve relatively low energy changes. Nuclear reactions: 1) Involve changes in the nucleus of an atom. 2) Often result in the transmutation of elements and the production of new particles. 3) They involve very high energy changes and can involve changes in the mass of the atom.

Question 5

Calculate the mass defect for oxygen-16 given this data. Round to the 5 decimal place.mass of an oxygen-16 atom: 15.994914 amumass of a proton: 1.00728 amu mass of a neutron: 1.00866 amumass defect = ⇒ 0.13261 amu

Revolt · Accepted Answer

PENDING

Question 6

Mass defect for oxygen-16 = 0.13261 amu How many kilograms does the mass defect represent?

Revolt · Accepted Answer

2.20 × 10 -28 kg

Question 7

Kilograms represented by the mass defect for oxygen-16: 2.20 × 10 -28 kgWhat is the nuclear binding energy for oxygen-16?

Revolt · Accepted Answer

1.98 × 10 -11 J

Question 8

How many protons does Thorium have? How many neutrons does Thorium-234 have? Calculate the mass defect for the isotope thorium-234 = amu

Revolt · Accepted Answer

"90"; "144"; "1.85864"; 90

Question 9

Mass defect for the isotope thorium-234 = 1.85864 amuHow many kilograms does the mass defect represent?

Revolt · Accepted Answer

3.09 × 10-27 kg

Question 10

Kilograms represented by the mass defect for thorium-234 = 3.09 × 10-27 kgWhat is the nuclear binding energy for thorium-234?

Revolt · Accepted Answer

2.78 × 10-10 J

The Nucleus Answers

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