🔹Topic 0-chemistry fundamentals

Question 1

What are isotopes?

Answer 1

Atoms of the same element with a different number of neutrons

Question 2

Give a difference between giant structures and molecular substances

Answer 2

Giant structures are made of billions of atoms chemically bonded together but molecular substances are made of many molecules

Question 3

In magnesium oxide, why is the mass of products greater than the initial mass of magnesium?

Answer 3

Because the atoms of oxygen are now being weighed as bonded to magnesium. They weren’t part of the original mass as they were in the air