Deepen your understanding of atomic structure, electron arrangement, and isotopes.
Electrons occupy shells around the nucleus, with a maximum capacity: 2 in the first shell, 8 in the second, and so on.
An atom has 11 electrons. How are they arranged in shells?
2 in the first shell, 8 in the second, 1 in the third
Why do atoms tend to gain, lose, or share electrons in reactions?
To achieve a stable, full outer electron shell, similar to noble gases
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons, giving them different mass numbers.
Carbon-12 and Carbon-14 are both forms of carbon. What makes them different?
They have different numbers of neutrons (and thus different mass numbers), while having the same number of protons
Why do isotopes of the same element have the same chemical properties?
Because chemical properties depend on the number of electrons (and protons), which is the same for all isotopes of an element
1. An atom has 8 electrons. How are they arranged in shells?
2. What is the maximum number of electrons in the first shell?
3. What is the maximum number of electrons in the second shell?
4. What are isotopes?
5. Why do isotopes have the same chemical properties?