If two protons and two neutrons are removed from the nucleus of an oxygen-16 atom, a nucleus of which element remains

Relative formula mass of ammonium sulphate?

Which of the following best describes what happens when an ionic bond forms? A) two atoms come together and share electrons in order to fill their octets. B) two atoms give up their electrons in order to form a bond.

Following a volcanic eruption, which event is usually the last one to be observed

Which element has the most electrons in is highest energy level? A. Carbon B. Iron C. Bromine D. Calcium

Why are sublimation and deposition unusual changes of state

A 25 N and 5 N force pull to the right. Friction is 10 N. If the object is 5 kg, find the net force and acceleration.

What properties of matter are intensive independent of their size

What is the density of an object having a mass of 8.0g and a volume of 25cm3

What is a Cilla? (In drawing)

Which term names the group of organisms able to interbreed and produce fertile offspring?