3.80 × 1024 grams containing
Carbon
calcuim
iron
hydrogen
iodine
nitrogen
oxygen
phosphorus
sulfur
The letters are the symbols for those elements
Answer:
The second period starts with Lithium and Beryllium which have 3 and 4 electrons and hence the last electrons enter the level 2s and they have an electronic configuration of 1s22s1 and 1s22s2
1. A synthesis reaction is the combination of two or more reactants to form a product. This would be choice 3, the synthesis of sodium chloride from sodium and chlorine.
2. A double displacement reaction is a reaction where two composite reactants switch partners. This would be choice 4, where sodium hydroxide and hydrogen sulfate trade groups to become sodium sulfate and water.
3. A combustion reaction is the burning of a carbon based compound in the presence of oxygen to generate carbon dioxide and water. This would be choice 2, where methane reacts with oxygen.
4. A single displacement reaction involves the donation of an atom from a composite molecule to another atom to form a different molecule. This would be choice 1, where the hydrogen gives the chlorine to zinc through the reaction.
5. A decomposition reaction involves the breaking apart of a complex molecule into simpler atoms. This would be choice 5, where calcium hydroxide decomposes into calcium oxide and water.