Consider the group 1a elements sodium (period3), potassium (period 4) and rubidium period 5). whatwould you predict about the ionization energies of theses elements?

Which element has 1s2s2p3s3p electron configuration?

A 52.0-g sample of an unknown metal at 99°C was placed in a constant-pressure calorimeter containing 75.0 g of water at 24.0°C. The final temperature of the system was found to be 28.4°C. Calculate the specific heat of the metal.

What is the difference between speed, velocity, acceleration.

If 21.3 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 297 Kelvin and 1.40 atmospheres? Show all of the work used to solve this problem. 2Li (s) + 2H2O (l) - > 2LiOH (aq) + H2 (g)

A sample of aluminum chloride (alcl3) has a mass of 37.2 g. a. how many aluminum ions are present? b. how many chloride ions are present? c. what is the mass in grams of one formula unit (molecule) of aluminum chloride?

Is Free Energy positive or negative in boiling water?

What is one element in the same family as oxygen?

Why does a ball rolling along a level sidewalk slow down and then stop

Common properties of sodium, calcium, iron, and gold

The closeness of a measurement to its actual value is a measure of its A. usefulness. B. reproducibility. C. precision. D. accuracy.