Common-Core/ Grade 7
Science MCQ Based On What are chemical elements and atoms
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Common-Core Grade 7 - 7 What are chemical elements and atoms
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Electronic configuration of elements
A particle with a negative electrical charge that is found outside an atom's nucleus is an
electron.
The chemical property of an element depends upon electronic configuration.
Recall the Rutherford model
If there are the same number of proton and electron, atomic number can be classified as proton number.
Particle number is the factor through which atoms of different elements differ from each other.
Charge on electron
A very small piece of matter with a positive electric charge passing through it, that is produced in a nuclear reaction
Think about protons and electrons
The first model of the atom was given by JJ Thomson.
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