- Use the following additional information to answer the next question. mass of gallium -69 nucleus=68.925580u mass of neutron=1.008665u mass of proton=1.007276u 1. The mass defect of gallium-69 is A. 0.619523 u B. 0.629246 u C. 0.650000 u D. 0.595420 u
- 60. Two particles, each with charge +4.2mu C, exhibit a repulsive force of 0 .25 N. Calculate the distance that separates the particles.7.2) 111
- 4. The wavelength of electromagnetic radiation that is given off when an electron returns from n=2 to the ground state (n=1) is __ nm.
- 15. For an electron that has quantum number n=3 and m_(1)=+1 ,which of the following is true? A. It may have quantum number t=1,2 B. It has only quantum number c C. It may have quantum number t=0,1,2 D. It has only quantum number x=1 16. Rutherford's a-particle experiment showed that A. Electrons revolve around the nucleus B. Neutron is found in the nucleus C. Most of the mass of an atom is concentrated in a nucleus D. All of the above 17. Atoms of the elements to the left hand side of the periodic table have: A. the highest ionization energy B. the smallestatomic radius C. the smallest electronegativity D. the highest valance electron D 18. Which of the following is not true? A. Alpha particles are deflected toward the negative plate B. Gamma rays are highly energetic electromagnetic radiation C. Beta particles are electrons which are emilted from the nucleus difit D. Radioactivity is the emission of light by unstable nuclei .A.jmcemilion antith) b
- 9. A 10 kg block of ice slides down a ramp 20 m long,inclined at 10^circ to the horizontal. a) If the ramp is frictionless, what is the acceleration of the block of ice? b) If the coefficient of kinetic friction is 0.10, how long will it take the block to slide down the ramp, if it starts from rest?
