Electron Affinity
When an element undergoes a chemical reaction, it either gains energy or loses energy. This gain or loss of energy is due to the phenomena that occur at atomic level. During reaction, atoms either gain electrons from other atoms or lose electrons to other atoms, and in that process, energy is produced.
P-Block Elements
Elements which are present on the right side of the periodic table are called p-block elements. In addition to the noble gases, they include the families of boron, mercury, nitrogen, oxygen and fluorine. These elements have diverse real-life implementations that we regularly experience around us.
Metals and Non-metals
The periodic table is composed of metals, semi-metals and nonmetal elements. The physical and chemical properties of metals and nonmetals differ from each other. The study of metals and nonmetals will help one to understand the appropriate application of the particular element.
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а. carbon
b. охygen
c. sulfur
d. fluorine
е.
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10. A balloon that's inflated indoors and then taken outside on a cold day will:
a. increase in volume
b. increase in pressure
c. decrease in volume
d. maintain a constant volume, but have a decrease in pressure
11. In order for a titration to be accurate and precise, which of these things are required?
a. have an indicator with an end point pH that will match the equivalence point pH
b. it needs to be done very quickly, before competing reactions can occur
ensure that no extra distilled water enters the flask during the titration
d. the analyte needs to be in the buret, while the titrant needs to be in the flask
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