According to periodic table which elements has seven valence electrons

A 13.0 L sample of helium gas has a pressure of 29.0 atm. What volume would this gas occupy at 3.50 atm? Assume ideal behavior.

When chlorine gas is passed through a potassium bromide solution, bromine forms in a potassium chloride solution?

How are weathering and erosion different?

Which is the least reliable method for identifying a mineral

A solution is prepared by dissolving 1.25 grams of silver chromate in 1.5 liters of water. After the solution was prepared, an additional 250. mL of water was added to it.

In which main energy level does the 's' sublevel first appear? K (first main energy level) L (second main energy level) M (third main energy level) N (fourth main energy level)

What is the nuclear charge of an alpha particle?

How many protons electrons and neutrons does 13C contain

Are all individuals in a population of animals or a population of plants identical

What is the valency of rhodium