1. 4.1
4.2
More
4.3
Potpourri 5 10 15 20 25 30 35 40 45

2. 4.1 5 pts.
This is defined as the smallest part of an element that retains the chemical properties of that element.
What is an atom?

3. pts.
He lived from 460 B.C.–370 B.C. and was among the first to suggest the idea of atoms
Who is Democritus?

4. pts.
One of the postulates of his atomic theory stated that Atoms of the same element are always identical.
Who is Dalton?

5. What is a chemical Reaction?
pts.
According to Dalton’s atomic theory, atoms retain their identity when they are involved in this.
What is a chemical Reaction?

6. pts.
True or false: Dalton hypothesized that all atoms of an element are identical .
What is True?

7. pts.
True or False. As part of his atomic theory, Dalton proposed that atoms are in constant motion.
What is false?

8. What is atoms are indivisible particles?
pts.
This postulate was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago
What is atoms are indivisible particles?

9. What is atoms are very small ?
pts.
Comparing the number of atoms in a copper penny with the number of people on Earth is made to illustrate what property about the atom.
What is atoms are very small ?

10. The range in size of most atomic radii is approximately this in meters
pts.
The range in size of most atomic radii is approximately this in meters
What is 5 x m to 2 x m?

11. Anions have this type of charge.
4.2 5 pts.
Anions have this type of charge.
What is negative?

12. pts.
He conducted experiments to determine the quantity of charge carried by a single electron?
Who is Miliken?

13. This scientist discovered the neutron in 1932.
pts.
This scientist discovered the neutron in 1932.
Who is Chadwick?

14. pts.
He discovered that the charge-to-mass ratio of electrons was the same, regardless of the gas used.
Who is Thomson?

15. It’s the name of this device.
pts.
It’s the name of this device.
What is a Cathode Ray tube? (also Crooke’s Tube)

16. pts.
When a neutral hydrogen atom loses an electron, this positively-charged particle remains.
What is a proton?

17. What is the alpha scattering or gold foil experiment?
pts.
This is the experiment that Rutherford performed when he discovered the nucleus of an atom
What is the alpha scattering or gold foil experiment?

18. pts.
This is the part of a Cathode Ray Tube that emits the stream of charged particles
What is the cathode?

19. This is the name of the particles used in the gold foil experiment.
pts.
This is the name of the particles used in the gold foil experiment.
What is alpha particles?

20. More pts.
This subatomic particle has a mass equal to 1/1840 the mass of a hydrogen atom
What is an electron?

21. More pts.
All atoms are neutral because they have equal numbers of these two type of subatomic particles
What are protons & electrons?

22. More pts.
These are the 2 types of subatomic particles found in the nucleus of the atom.
What are the protons & neutrons?

23. More pts.
The atomic number of an atom is defined as the number of these an atom has.
What are protons?

24. More pts.
The mass number of an atom is defined the sum of these two types of particles.
What are protons and neutrons?

25. More 4.2 30 pts. What are electrons?
As a consequence of the discovery of the nucleus, these particles are thought to be distributed around the nucleus and occupy almost all the volume of the atom .
What are electrons?

26. More pts.
An ion of a specific element always contains an the same number of these as an atom of that same element .
What are protons?

27. More pts.
The symbol 19F indicates a fluorine atom (atomic # 9) that contains this many neutrons.
What is 10?

28. More pts.
This is the name of the device that uses electrons to produce images that are magnified more than 100,000 times.
What is the electron microscope?

29. The atomic number of an element carbon.
4.3 5 pts.
The atomic number of an element carbon.
What is 6?

30. The average mass of an element’s isotopes.
pts.
The average mass of an element’s isotopes.
What is the atomic mass? (atomic weight)

31. pts.
An element has an atomic number of atomic of 83. The number of protons and electrons in a neutral atom of the element are ____.
What is 83?

32. The number 58 in the name Argon-58 represents this.
pts.
The number 58 in the name Argon-58 represents this.
What is the mass number?

33. pts.
Isotopes of the same element have different nos. of these in the nucleus.
What is number of neutrons ?

34. This is number of neutrons in O-18.
pts.
This is number of neutrons in O-18.
What is 10?

35. This is the correct symbol for an isotope of tritium.
pts.
This is the correct symbol for an isotope of tritium.
What is H-3?

36. pts.
This is how the number of neutrons in the nucleus of an atom can be calculated.
What is subtract the number of protons from the mass number?

37. This unit is used to measure weighted average atomic mass?
pts.
This unit is used to measure weighted average atomic mass?
What are amu’s?

38. This is the name given to a positively charged ion.
Potpourri 5 pts.
This is the name given to a positively charged ion.
What is a cation?

39. This equals one atomic mass unit.
Potpourri pts
This equals one atomic mass unit.
What is one-twelfth the mass of one carbon-12 atom?

40. This is the number of softball state titles that PLHS has won.
Potpourri pts
This is the number of softball state titles that PLHS has won.
What is 13?

41. He discovered the neutron.
Potpourri 20 pts.
He discovered the neutron.
Who is James Chadwick?

42. Potpourri pts.
This is why chemists use relative masses of atoms compared to a reference isotope rather than the actual masses of the atoms.
What is the actual masses of atoms are very small and difficult to work with?

43. The weighted average of the masses of the isotopes of the element
Potpourri pts.
The weighted average of the masses of the isotopes of the element
What is atomic mass?

44. Potpourri 35 pts.
This is the resulting change in the atomic number of an element when it emits a alpha particle.
What is a decrease of 2?

45. This is the number of State Tennis Championships PLHS has.
Potpourri pts.
This is the number of State Tennis Championships PLHS has.
What are 2?

46. This is number of state volleyball championships that PLHS has won.
Potpourri pts.
This is number of state volleyball championships that PLHS has won.
What are 5?