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What can u conclude about atoms with the most number of holes? Why?

18. (a) What did Ernest Rutherford observe during his experiments? (b) What did Niels Bohr observe during his experiments? (c) How did the work of each scientist contribute to the development of the planetary model of the atom? Explain your ideas in at least four (4) sentences.

Atomic Radius decreases as you move left to right even though there are additional protons ,neutrons and electrons becauses the increased _______of the nucleus.

21 X E Thalia Lara-Gonzalez - Hess's LE X L Period 6 Recording (2020-11-06 x ITasksBoard Desktop app for G x cs.google.com/document/d/1tMpLRVZ. * IL W O 63) - tlara2. D Disney+ | Movies a.. d Fonts oldies g Most Popular Book. O Teens - A Love Hate. 2 Login to Di nzalez - Hess's Law Calculations. O Draftback (1r Insert Format Tools Add-ons Help Accessibility Last edit was 17 minutes ago 00% Normal text Arial BIUA 11 三 IT 1 2 T 3 I I 4 I 2511 KJ 3. Use the standard heats of formation provided to calculate the standard heat of reaction for the reaction between hydrogen sulfide and oxygen shown. 2H2S(g)+302(g) - 2H2O(1)+2SO2(g) Substance AH°£ (kJ/mol) H2S (g) -20.6 O2 (g) SO2 (g) -29648 H2O (1) -285.8

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help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

The element antimony (Sb) has an atomic mass of 121.76 amu. Two naturally occurring isotopes of antimony are 121Sb (57% abundant) and 123Sb (43% abundant). In a sample of 100 Sb atoms, what is the probability that a single selected atom has a mass of 121.76 amu? A) 0% B) 43% C) 57% D) 100% E) Not possible to determine.

2. The data in the table show the amount of a 500 g sample of sodium-24 over time. Time (h) Na-24 (g) Time (h) Na-24 (g) 0 5 22338 39 78 10 15 20 40 50 1 F — 500 315 250 198 158 125 99 79 8 28228882 76 80 90 100 6 10 8 in 8 538 29 5 31 Make a graph of the data (remember to label all axes and title the graph). What is the half-life of sodium-24? Explain how you determined your answer. Sodium-24 decays by beta emission. Write a nuclear equation that shows the decay of sodium-24 and its products.

When light is shined on a thin sheet of metal, electrons are released with a kinetic energy of 6.81 x 10-21 J. If the binding energy of the metal is known to be 6.25 x 10-19 J, what is the wavelength of the light, in nm? Do not report units in your answer. Report your answer to one decimal places.