What happens when a pure substance undergoes a chemical change

A single electron can have the following set of quantum numbers: n=3, l=2, ml=0, ms = - 1/2. True or False

Ancient philosophers classifed water as an element. Why do modern scientists not classify water as an element?

Which is an inner planet? Neptune earth Saturn Jupiter

What types of atoms form metallic bonds?

Which substance can be described as a strong base

Where are two places that scientists obtain scientific knowledge

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.

Describe the attraction between 2 atoms as a result of sharing electrons

I need to know about mitosis and meiosis

What is sediment and debris, and what role does it play in the way sedimentary rock forms?