How do I balance
Sn + NaOH >Na2SnO2 + H2

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.