Help Which of the following statements is true?

The number of electron shells in an atom is called the atomic number.
Boiling and melting points are chemical properties.
A molecule of oxygen can have atoms of carbon in it.
Elements are substances made of only one type of atom.

According to the diagram; a) identify the anode of the cell and write the half-reaction that occurs there b) write the overall equation for the reaction that occurs as the cell operates c) calculate the value of the standard cell potential ,e cell. d)write the shorthand notation of the cell above e)indicate the flow of the electrons on the diagram

In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?

Give 2 characteristics of low mass stars