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What is the mass number?
the total number of protons and neutrons
What is the atomic number?
the number of electrons
What does the total number of protons and neutrons form?
the mass number
What does the total number of electrons form?
the atomic number
What is the number of electrons equal to?
To the number of protons
What is the number of protons equal to?
To the number of electrons
What are ions?
They are atoms that have the same number of neutrons and protons but have lost or gained electrons.
What are isotopes?
They are atoms that have the same number of protons and electrons but a different number of neutrons.
What is the difference between ions and isotopes?
Ions have a different number of electrons but isotopes have a different number of neutrons.
Why do isotopes have the same atomic number?
Because the number of electrons and neutrons remain unchanged.
Why do isotopes have different mass numbers?
Because they have different numbers of neutrons.
How does isotopes having different number of neutrons affect the mass numbers?
The mass number is different for each isotope.
How does isotopes having the same number of protons affect the atomic number?
The atomic number remains the same.
What are atoms that have lost electrons called?
Ions
What are atoms that have gained electrons called?
Ions
What are atoms that have a different number of neutrons called?
Isotopes
Why do ions have the different atomic number?
Because they have different numbers of electrons.
Why do ions have same mass numbers?
Because they have the same number of protons and neutrons.
How do you write the symbol of an isotope?
The chemical symbols, then a dash, followed by the mass number. e.g. carbon-12 and carbon-14
Why do isotopes of the same element display the same chemical characteristics?
This is caused by isotopes having the same number of electrons in the orbitals.
Why do isotopes of the same element display different physical properties.
This is caused by the different number of neutrons, which alter the mass of the atom.
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