In the past, many Canadians used wood
stoves or fireplaces to heat their homes.
Today, most Canadian homes burn oil or
natural gas or use electric heating.
Suggest more than one reason why this
change has occurred.

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

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