Which group of the priodic Table contains calcuim amd magnesium? Give reason for your answer.

What information could you use to determine the atomic number of an unknown element that has a mass number of 22? O A. number of ions B. number of isotopes C. number of neutrons O D. number of electrons

Draw the product formed when the compound shown below undergoes a reaction with br2 in ch2cl2.

Explain how water might have two different densities

What is the total number of electrons in the second principal energy level of a sodium atom in the ground state?

Which of the following organisms would likely be found on a decaying deer carcass (dead deer) ? a. Plant and animal b. Fungus and plant c. Bacteria and fungus d. All of the above

How many moles of hydrogen would be required to produce 5.0 mol of water?

What is the biggest difference between an exothermic and endothermic process? A. The direction of energy flow. B. The amount of energy transferred. C. The type of energy being transferred. D. The speed with which energy is transferred.

The mass of 1 mol of chromium (atomic mass 51.996 amu) is

Which of the following elements will tend to form a cation? A. Oxygen B. Nitrogen C. Sulfur D. Lead E. All of the Above

Is pure orange juice a solution or a suspension