11th grade atoms, elements and the periodic table
11th grade (Year 12 in England) · 16 questions · Common Core: NGSS.HS-PS1-7, NGSS.HS-PS1-8, NGSS.HS-ESS1-1 · England: GCSE Combined Science: Quantitative chemistry, GCSE Combined Science: Atomic structure (radioactivity) (nuclear equations), GCSE Physics: Atomic structure (nuclear fission and fusion)
Name
Date
Score/ 16
Question 1
What happens to a nucleus when it emits gamma radiation?
- A. It becomes a different element
- B. It loses energy but its mass and atomic numbers stay the same
- C. Its mass number falls by 4
- D. Its atomic number goes up by 1
Question 2
How are control rods used in a fission reactor?
- A. They absorb neutrons to control the rate of the chain reaction
- B. They produce electricity directly
- C. They speed up all the neutrons
- D. They cool the steam
Question 3
polonium-210 (mass number 210, atomic number 84) undergoes alpha decay to form Pb. What is the mass number of the new nucleus?
Answer
Question 4
A nucleus with A = 14, Z = 6 decays into a nucleus with A = 14, Z = 7. What type of decay is this?
- A. alpha decay
- B. beta decay
- C. gamma emission only
Question 5
Fertiliser bags often show the percentage of nitrogen. Why is this useful to farmers?
- A. It shows the price
- B. It shows how heavy the bag is
- C. They can work out how much nitrogen the crop actually receives
- D. It tells them the fertiliser is organic
Question 6
Fission or fusion: needs extremely high temperature and pressure?
- A. fission
- B. fusion
Question 7
What mass of carbon is in 900 g of C₆H₁₂O₆? (Ar: C = 12, H = 1, O = 16)
Answerg
Question 8
Fission and fusion: which statement is NOT true?
- A. Fusion splits large nuclei.
- B. A nuclear reactor uses a moderator to slow neutrons down.
- C. Both fission and fusion convert a small amount of mass into energy.
- D. Fission products are usually radioactive.
Question 9
What is the percentage by mass of carbon in carbon dioxide, CO₂? (Ar: C = 12, O = 16) Give 1 decimal place.
Answer%
Question 10
In alpha decay, by how much does the mass number decrease?
- A. 0
- B. 2
- C. 4
- D. 1
Question 11
In 2022 a US laser facility (the National Ignition Facility) reported a fusion milestone. What was it?
- A. a fusion power station started supplying homes
- B. fusion was achieved at room temperature
- C. uranium was fused into gold
- D. more fusion energy came out of the fuel than the laser energy delivered to it
Question 12
polonium-210 (mass number 210, atomic number 84) undergoes alpha decay to form Pb. What is the mass number of the new nucleus?
Answer
Question 13
A nucleus with A = 60, Z = 27 decays into a nucleus with A = 60, Z = 28. What type of decay is this?
- A. alpha decay
- B. beta decay
- C. gamma emission only
Question 14
The percentages by mass of all the elements in a compound always add up to…
- A. 100 %
- B. the Mr
- C. 50 %
- D. the number of atoms
Question 15
Fission or fusion: powers the Sun and other stars?
- A. fission
- B. fusion
Question 16
What mass of magnesium is in 400 g of MgO? (Ar: Mg = 24, O = 16)
Answerg
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