Aluminium is burned in the presence of oxygen to form aluminium oxide. Aluminium oxide reacts as both a base and an acidic oxide. What type of oxide is it?
Enter your answer

What is the percentage of hydrogen in nitrogen trihydride

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.

Match the term to its description match term definition chemical energy a) internal energy caused by vibrations of atoms and molecules electrical energy b) electromagnetic energy that travels in waves radiant energy c) the movement of an electrical charge thermal energy d) potential energy stored in the bonds between atoms