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SECTION 1:

Atoms & Reactions

1 Atomic structure & Isotopes

• Atoms are made up of protons, electrons and neutrons

• Neutral atoms have the same number of protons and electrons

• You can work out numbers of protons, electrons and neutrons from the element symbol

• To find the total number of electrons for positive ions take away the same number of electrons

from the atom (e g 3 from a 3+ ion) and for negative ions add the same number of electrons

Particle | Position | Relative M...
CHEM 2060CHEMISTRY- AS AS-Level Chemistry (New Spec) Notes. AS-LEVEL CHEMISTRY NOTES
Last document update:
ago
SECTION 1:

Atoms & Reactions

1 Atomic structure & Isotopes

• Atoms are made up of protons, electrons and neutrons

• Neutral atoms have the same number of protons and electrons

• You can work out numbers of protons, electrons and neutrons from the element symbol

• To find the total number of electrons for positive ions take away the same number of electrons

from the atom (e g 3 from a 3+ ion) and for negative ions add the same number of electrons

Particle | Position | Relative M...
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