Results of Firing Alpha Particles at Gold Foil Observation Proportion: Alpha particles went straight through gold foil > 98% Alpha particles went through gold foil but were deflected at large angles = 2% Alpha particles bounced off gold foil = 0.01% 9. What information do the experimental results above reveal about the nucleus of the gold atom? (A) The nucleus contains less than half the mass of the atom. (B) The nucleus is small and is the densest part of the atom. (C) The nucleus contains small positive and negative particles. (D) The nucleus is large and occupies most of the atom's space.

Select all of the following that are isotopes of 28Si.  Group of answer choices 29Si An atom with 14 protons and 16 neutrons An atom with 16 protons and 16 neutrons An atom with a mass of 29 Si-31 26P

Gold has one stable isotope, whichis gold-197, with an atomic mass of 196.97amu. A 14k (14-karat) gold contains 58.3% of gold and 41.7% of other metals. How manyatoms of goldare present in a 5.00-g sample of 14k gold?

In the equation, below, which disintegration product in the radioactive decay of carbon-14 results in the creation of a new nitrogen-14 atom? 14C -> 14N + °4B, O Gamma O Beta O Alpha O Lamda Which evidence is provided by J.J. Thomson about an atom? * O It is the smallest particle of matter. It contains negatively and positively charged particles. O It has an overall negative charge. O It has an overall positive charge.

The nuclear atom model put forward by Ernest Rutherfort is based on Rutherford's observation of the scattering behavior of alpha particles sent onto a thin gold plate. Which of the following is incorrect? 3 - a) Most of the alpha particles are backscattered after hitting the gold plate. O B) Most of the positively charged alpha partieles passed through the gold plate without any seattering. NS) The nucleus, where the protons are together, occupies a very small volume. O D) The positively charged protons inside the atom are concentrated in the nucleus. O TO) Few of the positively charged alpha particles hit the gold plate and are scattered back at a large angle.

Arrange the isotopes of sulfur and phosphorus in order of decreasing the number of neutrons.Rank the isotopes from most to fewest neutrons. To rank items as equivalent, overlap them.

Recent Modules 7 of 106 Part A When a U nucleus is bombarded by neutrons (n) it undergoes a fission reaction, resulting in the formation of two new nuclei and neutrons. The 92 following equation is an example of one such fission process: Un Ba Kr + Enter the isotope symbol for the barium (Ba) nucleus in this reaction. Express your answer as an isotope. > View Available Hint(s) ΑΣφ Submit

B С Complete each of the following equations. (Enter your answer in the form 2x. Enter He for an a-particle, e for a B-particle, y neutron, and H for a proton. Use the lowest possible whole number coefficients.) 1 (a) 18, F+?→ chemPad XX chemPad XX 15 ¹50+ He (b) ¹Li→ ¹Be + ? 1 121, (c) ¹2Sb +He- 51 chemPad XX +He? +n → Help Greek Help Greek 80 Help Greek W 20- Su... 990 MacBook Air DII FB a DD Ⓒ G for a y-particle, for a y-particle, e for a positron, 'n for a +1 P11

Which of the following is the least massive?  Group of answer choices An electron A proton An alpha particle A neutron All of these have more or less the same mass

11) To calculate the number of neutrons in an atom, you would subtract A) mass number from atomic number B) atomic number from electron number C) atomic number from mass number 12) What is the correct notation for a particle which has 17 protons, 18 neturals and 18 electrons? A) ECi- B) Ci- 1