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Chemistry
8th -
11thgrade
Calculating Protons, Neutrons, Electrons and Isotopes
56 questions
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- 1. Multiple ChoiceWhat is the atomic number of this nucleus?1347
- 2. Multiple ChoiceWhat is the atomic number of this atom?459none of the above
- 3. Multiple ChoiceWhat is the atomic number of this atom?246none of the above
- 4. Multiple ChoiceWhat is the atomic number of this atom?1234
- 5. Multiple ChoiceWhich particle has a positive charge?electronorbitalprotonneutron
- 6. Multiple ChoiceChoose the particle that has no charge.nucleusneutronprotonelectron
- 7. Multiple ChoiceAn electron has a _____ charge.negativepositiveneutral
- 8. Multiple ChoiceWhich subatomic particle has a negative charge in the atom?protonneutronelectronquark
- 9. Multiple ChoiceThe atomic number of Hydrogen is1234
- 10. Multiple ChoiceThe atomic mass of hydrogen is1234
- 11. Multiple ChoiceThe atomic number of Lithium is3456
- 12. Multiple ChoiceThe atomic number of Titanium is22232024
- 13. Multiple ChoiceThe atomic number of Nitrogen7689
- 14. Multiple ChoiceThe atomic mass of Aluminium is27232226
- 15. Multiple ChoiceThe atomic mass of Silicon is28272625
- 16. Multiple ChoiceThe charge of a normal atom is:PositiveNeutralNegative
- 17. Multiple ChoiceWhat is the mass number?the number of protonsthe number of protons and neutronsthe number of neutronsthe number of protons and electrons
- 18. Multiple Choice
To calculate the number of neutrons you should -
Subtract: Mass Number - Protons
Add: Mass Number + Protons
- 19. Multiple Choice
Mass Number =
Protons + Neutrons
Protons - Neutrons
- 20. Multiple Choice
Neutrons =
Mass Number + Atomic Number
Mass Number - Atomic Number
- 21. Multiple Choice
Which of following shows where the sub-atomic particles can be found?
nucleus: neutron and proton
electron shell: electron
nucleus: electron and proton
electron shell: neutron
nucleus: neutron and electron
electron shell: proton
- 22. Multiple Choice
which of the following is true about mass number?
mass number = number of protons + number of electrons
mass number = number of protons + number of neutrons
mass number = number of neutrons + number of electrons
- 23. Multiple Choice
Which of the following shows why an atom is neutral?
number of protons = number of electrons
number of protons = number of neutrons
number of electrons = number of neutrons
- 24. Multiple Choice
The following are representations of the element as seen in the Periodic Table.
Calculate the number of protons, electrons and neutrons for each of the following atoms.
number of protons: 12
number of electrons: 12
number of neutrons: 12
number of protons: 12
number of electrons: 12
number of neutrons: 24
number of protons: 12
number of electrons: 24
number of neutrons: 12
number of protons: 12
number of electrons: 12
number of neutrons: 36
- 25. Multiple Choice
The following are representations of the element as seen in the Periodic Table.
Calculate the number of protons, electrons and neutrons for each of the following atoms.
number of protons: 11
number of electrons: 11
number of neutrons: 12
number of protons: 11
number of electrons: 12
number of neutrons: 11
number of protons: 12
number of electrons: 11
number of neutrons: 12
number of protons: 12
number of electrons: 12
number of neutrons: 23
- 26. Multiple ChoiceWhat is the mass number and name of an element with 8 protons and 8 neutrons?16 - Carbon16 - Oxygen24 - Oxygen8 - Neon
- 27. Multiple ChoiceAn atom with atomic number 6 would have how many protons?6123cannot be determined
- 28. Multiple ChoiceProtons and Electrons balance the charge of an atom and are therefore always equalTrueFalse
- 29. Multiple Choice
what are isotopes？
same number of protons, but the number of neutrons varies
same number of electrons
same number of electrons, but the number of neutrons varies
only contains hydrogen and carbon
- 30. Multiple Choice
The number of electrons in an atoms is equal to ___?
atomic number
The number of protons
mass number
mass number-atomic number
- 31. Multiple ChoiceWhat is the number of protons that the element in this image contain?1471518
- 32. Multiple Choice
What is the atomic mass of this element?
9
18.998
F
19
- 33. Multiple Choice
What is the atomic number of this element?
22
47.867
48
The average of 22 and 47.867
- 34. Multiple ChoiceHow many protons does this isotope of titanium have?48222670
- 35. Multiple ChoiceHow many neutrons in C-14?67148
- 36. Multiple ChoiceHow many neutrons does the isotope of lithium have?8345
- 37. Multiple ChoiceHow many neutrons does uranium-235 have?23892146143
- 38. Multiple ChoiceWhat quantities vary between isotopes of an element?protons, electrons, and atomic massprotons, electrons, and atomic numberneutrons and electronsneutrons and atomic mass
- 39. Multiple Choicewhich atom has 4 neutrons?Li-6Li-7Li-8they have the same # of neutrons
- 40. Multiple Choice
Isotopes are atoms of the same element but can have different numbers of ____________.
protons
neutrons
electrons
quarks
- 41. Multiple ChoiceIsotopes are atoms of the same element with different #’s of __________ & therefore different __________.n0 ; atomic #’sp+ ; atomic #’se- ; atomic massesn0 ; atomic masses
- 42. Multiple ChoiceHow many neutrons does an atom of the isotope Neon-22 have?12102220
- 43. Multiple ChoiceIsotopes have different numbers ofprotonsneutronselectronproperties
- 44. Multiple ChoiceCopper has how many protons?2963.53011
- 45. Multiple ChoiceHow many protons does an Aluminum atom have? (use the picture to help you)27131440
- 46. Multiple ChoiceHow many protons are in this element?79196117Cannot be determined
- 47. Multiple ChoiceThe atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.9101928
- 48. Multiple ChoiceHow many neutrons does an atom of Nitrogen-13 have?67135
- 49. Multiple Choice
1. What is Half-life?
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
The amount of time it takes for half the nuclei in a sample of the isotope to decay
The amount of time it takes for half the electrons in a sample of the isotope to decay
the amount of time it takes to double the nuclei in a sample of the isotope to decay
- 50. Multiple Choice
When an element loses protons, its __________changes.
atomic number
protonic number
electronic number
neutronic number
- 51. Multiple ChoiceThe length of time required for half of the radioactive atoms in a sample to decay is its...eraagehalf-lifeeon
- 52. Multiple ChoiceWhat percent of carbon-14 would be left after 11,460 years? (2 half lives)100%75%50%25%
- 53. Multiple ChoiceWhat is radio active decay?The preserved remains of an organism.Atoms in an unstable element break down to form another element.When things die and their remains are buried.The time it takes for 1/2 of the radioactive atoms to decay in an element.
- 54. Multiple Choice
Which of the following statements is true?
An unstable daughter isotope decays into a stable parent isotope.
An unstable parent isotope decays into a stable daughter isotope.
A stable daughter isotope decays into an unstable parent isotope.
A stable parent isotope decays into an unstable daughter isotope.
- 55. Multiple Choice
The absolute age of a rock is the approximate number of years ago that the rock formed. The absolute age of an igneous rock can best be determined by
comparing the amounts of decayed and undecayed radioactive isotopes in the rock
comparing the sizes of the crystals found in the upper and lower parts of the rock
examining the rock's relative position in a rock outcrop
examining the environment in which the rock is found
- 56. Multiple Choice
Which of the following is a use of radioactive decay?
Smoke detectors
NASA spaceships
Sterilizing surgical equipment
all of these
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