A teacher wrote the following part of a balanced chemical equation Cu + 2AgNO3 -->

To show the conservation of matter in the chemical reaction, how many silver (Ag) atoms will be needed on the right-hand side of the balanced equation?

A - 2

B - 0

C - 1

D - 3

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

Compound with sulfer  is bright red