Energy levels and electron configurations (including representation using orbital diagrams) of several common elements on the periodic table. Identify groups and periods of elements on the periodic table, and know the trends of reactivity, atomic size, ionization energy, and electron affinity within a group or period. Page 297 - 320; page 325 – 329; page 341 – 350 and page 353 – 359; page 393 – 420; * Chemical bonding and Lewis structures. Molecular geometry. Gases (concepts and problem
________________________________________________________________ ________________________________________________________________ ________________________________________________________________ 2. Explain how the octet rule predicts the stability or reactivity of atoms. ________________________________________________________________
HSC Chemistry Assessment task 1 Nuclear Chemistry Research report 1. Distinguish between stable and radioactive isotopes and describe the conditions which a nucleus is unstable. To understand if an element is stable we first must understand what stability is. The stability of the nucleus is directly related to the strength of the forces that hold the nuclear particles together. These protons and neutrons of the nucleus are called nucleons.
| 9 | 5 | What Is The Relative Abundance Of Pre- And Post-1982 Pennies In A Sample of 1982 Pennies? | 10 | 6 | What Are The Identities Of The Unknown Substances? (Flame Test Lab) | 11 | 7 | How Does The Placement Of Elements On The Periodic Table Demonstrate The Periodic Law? | 12-13 | 8 | How Do Ionic Bonds Form? | 14 | 9 | Is The Substance Ionic Or Covalent?
A. 2.44 x 1014 B. 3.69 C. 4.10 x 10-17 D. 2.44 x 1016 E. 9.62 x 1012 3. The energy of a photon that has a wavelength of 13.2 nm is __________ J. A.
Which pairs will react from an ionic compound? Chlorine and oxygen Nitrogen and Lithium b. Which pairs will react from a molecular compound? Flour nine and Argon c. Which pairs will not react to form a compound? Aluminium and potassium 7) A certain particle was found to contain sixteen protons and eighteen electrons.
1.23 C. 5.74 X 10-4 D. 0.658 _____ 14. Which of the following is true for the following voltaic cell? Zn (s) ( Zn2+(aq) (( Cr3+ (aq) ( Cr (s) A. The electrons flow from cathode to the anode. B.
* Avogadro’s constant: The number of toms per mole is called the Avogadro’s constant. It has a value of 6.02x10^23. * Relative atomic mass: The relative atomic mass of an element is the average mass of one atom of the element relative to 1/12th the mass of one atom of carbon-1 (Ar), On a scale
5. Nitrogen has two naturally occurring isotopes N-14 and N-15, whose atomic masses are 14.0031 and 15.00001, respectively. The atomic mass of nitrogen is 14.0067. What are the percentages of each of the isotopes? 6.
What do you think would happen to the temperature of the ice if you added 6 tablespoons of salt instead of 2 tablespoons? 5. If there are charged particles that can move around in a substance, that substance is able to conduct electricity. So, do ionic compounds or covalent compounds conduct electricity when dissolved in water? Explain.