what are chemical reactions? a CHEMICAL REACTION is the change of a substance into a new one that has a different chemical identity. there are several different types of chemical reactions. combustion reactions, synthesis reactions, single-replacement reactions, double-replacement reactions, decomposition reactions.


                

 A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

the periodic is a table in which different elements are organized. it is organized by the atomic number of the element and how the electrons of the element are organized. the atomic number is the number of protons that are in the nucleus. the electron affinity is when an electron is added to a neutral atom to make it a negative ion

flame test lab

some metal icons can be identified by the color of their flame during a flame test. different elements placed into a flame will turn the flame different colors. 

what metals do colors indicate? when you put the different metals in the fire depending on what metal it is the fire will react by differentiating in colors. 

chemical formula          name of metal          color produced 

Kno3                                 K                           peach 

Sr (No3)                           S                              orange-red

Cl                                 Ba                                    green

DCU                                 D                              yellow green sparks

 (No3)                          Ci                                 deep orange-red

CoCl                                Co                          orange

scientific observations- skills lab 1

proper scientific technique requires observations to make conclusions.


-we put 150 ml of water into a beaker
-after we measured the temperature with a thermometer and it read 20 degrees celcius
-we were received a spoon full of copper cloride and put it on a paper towel
-the copper chloride appeared to be a crystaly blue color
-we put the crystals in the water and they sunk to the bottom and turned a greenish color
-the top of the water was still clear
-after putting the crystals in the water the temperature dropped to 18 degrees celcius
-while stirring mixture the chloride dissapeard and turned to blue
-we got a strip of tin foil 1.5 cm by 15 cm long and put it in the mixture
-the mixture became cloudy blue after we put the foil in the mixture
-the foil started to come apart and it looked as if it was rusting
-we could see the bits of aluminum coming off the stripn
-the temperature went down one degree after the aluminum was put in
-we got the water the next day and it became a flakey blue color
-we mixed it and it became a powdery purple grayish color
-after we flitered the water through the flask the water became blue again

why study science???

why i took physical science. 

i took physical science to learn how to embrace science and how to comprehend it if i used it in a job.....