1. When a metal and a(n) ___ bond, they do not share electrons. 2. The ___ atom transfers one or more valence electrons to the atom, forming a chemically stable compound. 3. A(n) ___ is an atom that is no longer electrically neutral because it has lost or gained one or more valence electrons. a. An atom that loses one or more valence electrons becomes an ion with a(n) ___ charge.

1 . Nonmetal

2. metal, non metal

3. Ion

4. positive

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: