ib 7.1 the nucleus

Question 1 The strong force is thought to be due to the continual exchange of

• A protons
• B muons
• C quarks
• D glouons

Question 2 Which of the following is not true about the strong force?

• A It is very short range.
• B It is stronger between 2 neutrons than 2 protons.
• C It saturates when there are a lot of particles.
• D It is the strongest of the fundamental of forces.

Question 3 Gravity can not be the force that holds nucleons together because

• A gravity does not act between sub -atomic particles
• B the range of gravity is too long.
• C gravity is too weak.
• D nucleons have no mass.

Question 4 A and B are ions of the same element. Ion A have a charge of +1 and B has a charge of -1. Which of the following statements is true?

• A A has 2 more protons than B.
• B A has 1 more proton than B.
• C A has 2 more electrons than B.
• D A has 2 less electrons than B.

Question 5

• A 63 neutrons and 29 protons
• B 92 neutrons and 63 protons
• C 29 neutrons and 63 protons
• D 34 neutrons and 29 protons

Question 6 An atom of Carbon

• A always has 6 protons
• B always has 6 neutrons
• C always has 6 electrons
• D never has more protons than neutrons

Question 7

• A Niobium has 41 neutrons.
• B A neutral atom of Zirconium has 40 electrons.
• C An atom of Molybdenum has a larger mass than Titanium.
• D A positive ion of Vanadium could have 24 electrons.

Question 8 A carbon ion has 5 electrons, 6 neutrons and 6 protons. Its mass and charge are charge (e) mass (U)

• A 0 6
• B 0 12
• C +1 12
• D -1 6

Question 9 8 bags of red balls have the following mass: 1000 g, 1600 g, 1400 g, 1350g, 900 g, 1250g, 800g, 1050g The most likely mass of one ball is

• A 150 g
• B 100 g
• C 50 g
• D 25 g

Question 10 A Hydrogen atom has no charge, a mass of about 1 U and a diameter of 10⁻¹⁰ m. Which of the following are the approximate charge, mass and diameter of the nucleus of Hydrogen? charge (e) mass (U) diameter (m)

• A +1 1 10⁻¹⁰
• B +1 1 10⁻¹⁵
• C 1 1/2 10⁻¹⁵
• D 1 1/2 10⁻¹⁰