Zadanie 5
What is the correct number of subatomic particles in ? A. 30 protons, 32 electrons, 35 neutrons B. 30 protons, 28 electrons, 65 neutrons C. 35 protons, 28 electrons, 30 neutrons D. 30 protons, 28 electrons, 35 neutrons
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What is the correct number of subatomic particles in ? A. 30 protons, 32 electrons, 35 neutrons B. 30 protons, 28 electrons, 65 neutrons C. 35 protons, 28 electrons, 30 neutrons D. 30 protons, 28 electrons, 35 neutrons
State the electron configuration of a phosphorus atom, P.
State one physical property of phosphorus that supports its classification as a non-metal.
Suggest a balanced equation for the reaction of carbon dioxide with water that contributes to ocean acidification.
Glucose is made in the leaves of green plants by photosynthesis. Write the balanced equation for the overall reaction of photosynthesis.
What is the maximum number of electrons that can occupy the fifth energy level (n = 5) in an atom? A. 25 B. 32 C. 50 D. 72
Outline why the estimated rate calculated from the preliminary experiment is not the initial rate of the reaction.
The student then followed the reaction with a spectrophotometer, which records the light absorbed by the mixture and so gives the concentration of the dye throughout the reaction. The graph shows [D+] against time for experiment 3. (i) Use the graph to…
Which electron transition produces the line of longest wavelength in the visible region of the hydrogen line emission spectrum? A. Transition A B. Transition B C. Transition C D. Transition D
Chromium is a first-row transition element. (i) Deduce the nuclear symbol, ZAX, of the chromium-52 ion that contains 21 electrons. (ii) Chromium(II) chloride, CrCl2, melts at 824 °C. Explain how the ions are held together in solid…