Semester I Review

Semester I Review How many sig-figs are found in each number? 0.345 3005 300 3.002 0.00023

Semester I Review Round each number to three sig-figs. 45678 0.002894 23.76 100.5 56.799

Semester I Review Which of the following is a mixture. Pure water Clean air Iron (II) oxide Salt water Carbon dioxide

Semester I Review Which of the following is a chemical change. Cutting paper Boiling water Rusting iron Burning gasoline

Complete the table using the given numbers Symbol Mass # Atomic # Protons Neutrons Electrons X - ___ 10 15 Y - 35 14 Z - ___ 56 25

Semester I Review Calculate the average atomic mass given the following data: element Y has three isotopes 35.0% = 23.5 amu, 55.0% = 25.0 amu and 10.0% = 26.0 amu.

Semester I Review 25.0 grams of a given metal displaces 44.2 mL of water; what is the density of the metal?

Semester I Review What did each scientist contribute to the development of the modern atom. Dalton Thomson Rutherford Milliken

Determine if the data below is accurate, precise, both, or neither Trial # Measurement True Value = 34.50 1 34.56 2 34.45 3 34.78 Calculate the percent error using the average of the measurements.

Semester I Review The splitting of a nucleus is known as ________. The combining of two small nuclei to form a larger one is known as __________. Give the formula of an alpha particle and beta particle.

Semester I Review Decay of polonium-218 by alpha () emission. Decay of carbon – 14 by beta emission Decay of Thorium - 232 by an electron capture

Semester I Review The half-life of phosphorous-30 is 2.5 min. If you start with 55 g of phosphorus-30, how many grams would remain after 27.5 min?

Semester I Review A radioactive isotope decayed from 200.0 grams to 3.125 grams in 15 years. Determine the half-life of the isotope.

Semester I Review Calculate the wavelength of electromagnetic radiation with a frequency of 6.5x1016 Hz. Calculate the energy of the above electromagnetic radiation.

Semester I Review If n=4; how many sublevels, Orbitals, and Electrons are present? T or F (p) sublevels have 7 orbitals T or F (d) sublevels hold 6 electrons T or F (s) sublevels hold 2 electrons

Semester I Review For the element Cobalt; give the: Long hand electron configuration Box and arrow notation Noble gas configuration Electron Dot Structure

Semester I Review Give the ion for each of the following elements: Sodium, Oxygen, Chlorine, Barium, Gallium, Sulfur, Nitrogen, Aluminum, Silver, Zinc, Cadmium

Semester I Review Give the formula for the following compounds 1) iron (II) arsenide 2) lead (II) sulfate 3) lead (IV) hydroxide 4) copper (II) acetate 5) beryllium chloride 6) ammonium chromate 7) silver oxide 8) potassium sulfide

Semester I Review Give the name of the following compounds 1) NaBr 2) Sc(OH)3 3) V2(SO4)3 4) NH4F 5) CaCO3 6) NiPO4 7) Li2SO3 8) Zn3P2 9) Sr(C2H3O2)2 10) Cu2O