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Comprehensive Science Measurement and Chemical Structure Exercises

This document covers a series of science exercises focusing on measurement, bonds, and chemical structures. It includes converting numbers to scientific notation, calculating density from displacement, and evaluating fat consumption in a diet. Additionally, it explores valence electrons, electron dot structures, molecular shapes, and resonance in Lewis structures. There are also questions on naming compounds and writing chemical formulas. Furthermore, it discusses atomic structures, subatomic particles, electron configurations, and comparisons of metallic properties. Ideal for students of chemistry.

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Comprehensive Science Measurement and Chemical Structure Exercises

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  1. Measurement 100 Put the following numbers in scientific notation: • 40081230 • 0.00200 • 240.3

  2. Measurement 200 A 5000. mg block of an unknown material displaces 0.635 cc of water. What is the density of this material (in g/mL)?

  3. Measurement 300 A patient’s diet is restricted to 30.0 g of fat per day. If she eats a 0.20 kg burger that is 25% fat by weight, has she exceeded her fat limit for the day?

  4. Bonds & Chemical Structures 100 How many valence electrons are in sulfur tetrafluoride?

  5. Bonds & Chemical Structures 200 Draw the electron dot structure for hydrazine (N2H4)

  6. Bonds & Chemical Structures 300 What is the shape of each of the following molecules? CH4 SiH3Cl PF3 H2S Which of these molecules are polar?

  7. Bonds & Chemical Structures 400 Draw the Lewis dot structure for CH2O. Draw the Lewis dot structure for CH3CO2-. Hint: both oxygen atoms are attached to ONE of the carbon atoms Do either of these exhibit resonance?

  8. Names & Formula 100 Name the following compounds • LiBr • Ca3N2 • Cu2S

  9. Names & Formula 200 Name the following compounds: • PCl3 • N2O5

  10. Names & Formulas 300 Which of the following contains an ion with a 3+ charge? KCl Na2O FeCl3 Mg(NO3)2

  11. Names & Formula 400 Name the following compound: (NH4)2SO4 ...and… Write the formula for magnesium phosphate

  12. Atoms & Elements 100 Describe the structure of an atom and the three types of subatomic particles

  13. Atoms & Elements 200 Write the atomic symbols for the elements described below: • An atom with 15 protons and 16 neutrons • A neutral atom with 17 electrons and 20 neutrons

  14. Atoms & Elements 300 What atoms are described by the following electron configurations? • 1s22s22p63s23p64s23d104p6 • [Ar] 4s23d104p3 • 1s22s22p63s23p64s23d5

  15. Atoms & Elements 400 Consider F and Na. Which is more metallic? Which has a larger atomic radius? Which has a higher ionization energy? Which is more electronegative?

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