P2.11 5a
Atomic facts
Name
FH
Class
Date
1 If a proton is said to have a mass of 1 and a charge of +1, what are the masses and charges of the
following:
a a neutron? b an electron? c a hydrogen atom?
2 The nucleus of a carbon atom has 6 protons and 6 neutrons.
a What is the mass number of this atom? b What is the atomic number of this atom? c How many electrons will orbit the nucleus?
d What is the overall charge of the atom? e Draw the structure of the carbon atom.
f What differences would there be between the carbon atom and an oxygen atom?
3 An alpha particle has 2 protons and 2 neutrons.
a What is the mass number of this particle?
b How many electrons orbit it? c What is the overall charge of the alpha? d Draw the structure of the alpha particle.
e What differences would there be between the alpha particle and a helium atom?
4 The mass number of a uranium atom is 235. It has 92 protons.
352
a How many neutrons are in this atom? b How many electrons will orbit the nucleus?
c What is the overall charge of the atom? GCSE Additional Science Copymaster File
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