Which of the statements about atoms are true? 1. All matter is made of atoms.
2. Air is between atoms in substances
3. There is nothing between atoms in a gas.
4. Living organisms are made of atoms.

Select all that apply.

number 1 I think

Explanation:

I did this at school but forgot

b. th3 n4zc4 pl4t3 15 c0nv3rg1ng w1th the s0uth 4m3ric4n pl4t3.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.