1: viewing any chemical reaction in a laboratory
2: dangerous to look at when it burns & used in photography, fireworks, and flares
3: the product
Answer: D
Explanation: both experimentation and observation
Answer:
6. Double replacement "DR"
7. Double replacement "DR"
8. Combustion "C"
9. Single replacement "SR"
10. Decomposition "D"
Explanation:
- number 6 and 7 are double replacements because if you look at the compounds in the reactants vs the products, it is evident that there has been a replacement between Na & K in number 6 and Mg & Li in number 7, a "DR" occurs when the anions and cations in 2 molecules switch places to form 2 new compounds.
- number 8 is a combustion reaction because a combustion reaction occurs when oxygen is combined with another compound to form water and carbon dioxide (H2O & CO2).
- number 9 is a single replacement reaction because the Pb and Fe have simply switched places, "SR" are when an element trades with another to form a new compound and the element that was swapped.
- number 10 is a decomposition because it can be observed that the compound in the products is being broken down into the molecules or compounds that it is made up of, started with one and finished with 2
Answer:
Ground state electronic configuration of oxygen atom is as follows - is 1s2 2s2 2p2x 2p1y 2p1z 1s2 2s2 2px2 2py1 2pz1
Ground state electronic configuration of hydrogen atom is 1s1 1s1
Explanation:
As per the Valence Bond Theory (VBT),
Ground state electronic configuration of oxygen atom is as follows - is 1s2 2s2 2p2x 2p1y 2p1z 1s2 2s2 2px2 2py1 2pz1
Ground state electronic configuration of hydrogen atom is 1s1 1s1
Considering the electronic configuration, H-O-H bond angle would be at 90 degrees as 2py2py and 2pz2pz are oriented 90° with respect to each other. But if the oxygen atomic orbitals is used directly then bond angle for water is 104.45° as per the VSEPR theory which states that 2s2s spherical orbit in oxygen can adjust the bond angle by creating new hybrid orbitals