Question 1

Which of the following is a possible ground-state electron configuration?

[Xe] 6s24f145d106p2

[Kr] 5s24d85p3

[Xe] 6s25d106p4

[Kr] 5s25d105p5

Some instruments differentiate individual quanta of electromagnetic radiation based on their energies. Assume search and instrument has been adjusted to detect photons that have 1.00 x 10^-16 J of energy.

If 500 ml of air contains 2 x 10^22 particles (Atoms and molecules), how many particles do you inhale in one day if you breath 15000 L of air? a. 2 x 10^22 b. 6 x 10^26 c. 1.2 x 10^27 d. 5 x 10^24

Which of the following describe (s) the changes, on a molecular level, when a solid melts? Select one: a. The molecules become more widely separated. b. The molecules acquire greater freedom of motion. c.

The Ph scale is logarithmic; how many times stronger is a Ph of 4 versus a Ph of 2?

An element's atomic number is 98. How many protons would an atom of this element have?

During its life cycle, an amphibian lives both on land and in water.

An atom that contains 22 protons, 23 neutrons, and 22 electrons would have a mass of approximately

Compared with a ph of 7, a solution of ph 5 has what times/fraction of the hydrogen concentration?

Write a formulae equation to represent the combustion of carbon to form carbon dioxide and the thermal decomposition of magnesium carbonate

A5.00 liter ballon of gas at 25 degree Celsius is cool to 0 degrees Celsius. What is the volume (liters) of the ballon?