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Write the predicted electron configuration (short version using the noblegas core) for the following atoms  Pt Leave 1 space between each term. For example Nitrogen would be entered: [He] 2s2 2p3

Write the expected short electron configuration for As. Leave 1 space in between each term. For example: nitrogen would be [He] 2s2 2p3

A 35.0 g sample of nickel metal is heated to 100.°C and dropped into 100.0 g of water, initially at 22.0°C. Assuming that all of the heat lost by the nickel is absorbed by the water, calculate the final temperature of the nickel and the water. The specific heat of nickel is 0.444J/g°C)

What property of the oxygen atom is represented by the equation O(g) + e- –> O-(g)?

5.26 grams of the same unknown compound (mm=88.0 g/mol)was completely reacted in a calorimeter and all of the energy was transferred to 1000.0 grams of water at an initial temperature of 23.0 degrees C. Calculate the final temperature of the water.

The enthalpy change under standard conditions for which of the reactions below would be equal to ΔHºf of NaOH(s)?

Calculate the energy of light emitted when the following transition occurs in a hydrogen atom: n=6 to n=3 Enter your value as a positive.

The complete combustion of an unknown organic compound (mm= 88.0 g/mol) released 673 kj of energy when 37.2 grams of the compound reacted in excess oxygen. Calculate the heat of combustion for the reaction.

Vanillin, C8H8O3 (mm= 152 g/mol), is the molecule responsible for the vanilla flavor in food. How many oxygen atoms are present in 45.0 mg sample of vanillin?

Which element has chemical properties most similar to those of P?