Mid summative 1-2 answers 2011
- 1. What is it? Rearrange the symbols for the elements and use the clues provided to figure out the words. 1. You need this to see! Sodium + Titanium + Rhenium 2. You or me Sulfur + Nitrogen + Phosphorous + Oxygen + Erbium 3. Vacation home Calcium + Indium + Boron 4. Don’t gamble on this one! Erbium + Polonium + Potassium
- 2. 1. You need this to see! Sodium + Titanium + Rhenium 2. You or me Sulfur + Nitrogen + Phosphorous + Oxygen + Erbium 3. Vacation home Calcium + Indium + Boron 4. Don’t gamble on this one! Erbium + Polonium + Potassium The answers are … Na + Ti + Re RETINA S + N + P + O + Er PERSON Ca + In + B CABIN Er + Po + K POKER
- 3. Which elements are in the following substances? Nitrogen, Hydrogen, Carbon, Oxygen (NH 4 ) 2 CO 3 Ammonium carbonate Lead, Carbon, Hydrogen, Oxygen Pb(C 2 H 3 O 2 ) 2 Lead acetate Oxygen O 3 Ozone Carbon, hydrogen, oxygen C 12 H 22 O 11 Sucrose Hydrogen, Oxygen H 2 O Water Names of elements Chemical Formula Substance
- 4. What is the difference between Co and CO? Co is the symbol for the element Cobalt CO is the symbol for 2 elements , Carbon and Oxygen
- 5. Which are substances? Ni Co Fe CO CaCO 3 MgSO 4
- 6. Why are they a substance? Each is a form of matter that is different from the other forms of matter
- 7. How are elements & matter related? Elements are the building blocks of matter
- 8. Why was the mystery mixture a chemical reaction? A chemical reaction is the combination of 2 or more substances that results in a new substance. We combined the mystery mixture with water and a gas (bubbles) formed which is a new substance
- 9. Periods are determined by number of orbitals (outer rings) found in an atomic model Groups are determined by number of electrons found in the outer orbital of an atomic model Name of the element can either be determined by looking at the number of protons which is the atomic number of the element OR using the period and group to locate it on the periodic table Atomic Model In what period would you find this element? In what group would you find this element? Name of element 4 2 3 2 6 7 Calcium Oxygen Chlorine
- 10. Atomic number – 16 Atomic mass – 54.938 Protons – 16 Neutrons – 39 Electrons - 16 Atomic number – 19 Atomic mass – 39.098 Protons – 19 Neutrons – 20 Electrons - 19 16 S Sulfur 54.938 19 K Potassium 39.098