What is the charge of a potassium (K) ion?

The Periodic Table

A. - 1

B. + 1

C. + 4

D. - 4

What characteristic of helium distinguishes helium from the other noble gases?

Which statement correctly explains the molecular structure of water? A) One oxygen and two hydrogen atoms are joined by a covalent bond. B) One hydrogen and two oxygen atoms are joined by a covalent bond.

What kind of energy transformations occur when you hit a coconut with a hammer

What is the electron structure of a beryllium ion with a net ionic charge of + 2? 1s1 1s2 2s1 2s2

How can an atom of element be identified

Evaluate - if you put a scale in an elevator and weigh yourself as you ascend and the descend, does the scale have the same reading in both instances?

Why would you add a catalyst to something

A sample of the sugar d-ribose (C5H10O5) of mass 0.727 g was placed in a calorimeter and then ignited in the presence of excess oxygen. The temperature rose by 0.910 K. In a separate experiment in the same calorimeter, the combustion of 0.

the volume of an ideal gas in a container is 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K

Which of the Following Will result in increasing temperature of s gas