Explain how the number of valence electrons of group a elements are related to the group number

A miner develops cancer of the esophagus. ten years later

How do we find mass number of elements in chemistry?

A mixture of Ar, He, and O2 has a total pressure of 1,015 kPa. Argon exerts a partial pressure of 152 kPa and Helium exerts a partial pressure of 305 kPa. What is the partial pressure of oxygen in this mixture? a. 1,472 kPa b. 558 kPa c. 863 kPa d.

What is the transfer of energy by electromagnetic waves? A) radiation B) conduction C) convection D) thermal energy

Of the pigments that were soluble in the solvent, which pigment is the most polar? yellow, red, purple, blue

What are the elements with atomic numbers from 58 to 71 in the periodic table called?

Which of these elements elements has an electron configuration of [Kr]5s2

Which of the elements listed is the most abundant extracellular anion?

What is the chemical formula for the chemical magnesium nitride?

Why are parentheses used to write the formula AI (OH) 3