1. The universe is composed of two main parts:
ANSWER: matter and energy
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2. “Matter can be converted to energy and vice versa.” This is known as the __________.
ANSWER: Einstein’s Theory
3. What is the elementary particle that has no charge, has zero (or near-zero) rest mass and travels at the speed of light
ANSWER: neutrino
4. What are heavy particles that conducts the proton and the neutron.
ANSWER: Baryons
5. What particles have rest masses ranging down to about 0.1 AMU?
ANSWER: Mesons
6. What particles include the electron, the mu particle and the neutrino?
ANSWER: Leptons
7. What is the term used to describe the amount of energy that is given off when an electron moves from one orbit to a lower orbit?
ANSWER: Quantum
8. Which of the following is considered the first antimatter particle discovered?
ANSWER: Positron
9. According to the Pauli Exclusion Principle,
ANSWER: No two electrons can have the same set of values for the four quantum numbers
10. What is an integer number which determines the angular momentum of the electron due to its orbital motions?
ANSWER: Orbital Quantum Number
11. What is an integer number which determines the component of the angular momentum of the electron along a specific direction?
ANSWER: Magnetic Quantum Number
12. What is the number which is used to describe the intrinsic spin angular momentum of the electron?
ANSWER: Spin Quantum Number
13. What is emitted when an electron changes from a higher energy orbit to a lower energy orbit?
ANSWER: Photon
14. The electron in a single electron atom exists in circular orbits called ___________ orbits.
ANSWER: Stationary
15. A hydrogen atom is in the ground state when its electron is
ANSWER: in the innermost orbit
16. What is generally the accepted nominal mass of a proton
ANSWER: 1 AMU
17. The type of bonding refers to the sharing of electrons
ANSWER: Covalent Bonding
18. What is the combination of two or more materials that has properties that the components materials do not have by themselves?
ANSWER: Composite
19. What determines the ability of atoms to combine with other atoms
ANSWER: The Valence Electron
20. What property of an element is determined by the number of protons in the nucleus?
ANSWER: Atomic number
21. What is the mass (in grams) of an electron?
ANSWER: 1.672 x 10-28
22. What is the mass (in grams) of a proton?
ANSWER: 1.672 x 10-24
23. What is the mass (in grams) of a neutron?
ANSWER: 1.675 x 10-24
24. What is the charge of an electron?
ANSWER: -1.602 x 10-19
25. What is the charge of a proton?
ANSWER: 1.602 x 10-19
26. What is the diameter of nucleus?
ANSWER: 10-15 to 10-16
27. What is the radius of an atom?
ANSWER: 10-14
28. What is the particle that consists of two up quarks and one down quark?
ANSWER: proton
29. What is the particle that consists of two down quarks and one up quark?
ANSWER: neutron
30. It is the angular momentum of neutron, proton and electron
ANSWER: h/4π
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