atoms physics paper 1 (P6)
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12 Terms
Describe the basic structure of an atom
Nucleus containing protons and neutrons which have an orbiting shell of electrons
Describe the plum pudding model
A sphere with a positive charge and negative electrons in it
What charge odes a proton have?
Positive
What share does a neutron have?
No charge
What charge does an electron have?
Negative
Why do atoms have no overall charge?
It has an equal number of positive protons and negative electrons
How small is the nucleus compared to the whole atom?
Around 10 000 times smaller
What is ionistaion?
Process which adds or removes electrons from an atom
What is formed if an atom looses an ion?
Positive ion
How does am atom become a negative ion?
It gains one or more electrons
What is the mass number of an element?
Number of protons + number of nuetrons
What are isotopes?
Atoms of the same element that have the same number of protons and a different number of nuetrons