The atomic number of sodium (Na) is 11. Which of the following is the correct electron configuration for this neutral atom?

Question 1 options:

1s22s22p63s1

1s22s22p6

1s12s12p63s3

1s22s23s24s2

You are heating a solution in the laboratory. As the solution heats up, it begins to bubble. After turning off the heat, you notice that the remaining liquid remains colorless, but you smell a sharp odor.

A boy jumps into a cold swimming pool and his body temperature goes down. His muscles, blood vessels, and nervous system work together to restore his body temperature.

A chemical reaction has an increase in entropy and a decrease in enthalpy. What is known about the spontaneity of the reaction?

How is H fusion used to calculate the mass of solid that 1 kj of energy will melt?

You need a 20% alcohol solution. on hand, you have a 240 ml of a 15% alcohol mixture. you also have 40% alcohol mixture. how much of the 40% mixture will you need to add to obtain the desired solution?

The concentration of commercially available concentrated nitric acid is 70.0 percent by mass, or 15.9 M. Calculate the density and molality of the solution.

Whats 2 properties of iron?

Which light packs the highest energy per photon

Which of the following hydrocarbons will most likely be found around cows?

Campare how the structure and function of a plant is similar to the human body