Atomic mass, number and isotopes
- Created by: wilby99
- Created on: 27-01-16 13:42
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- atomic mass, number and isotopes
- structure of the atom
- the number of protons is always the same as the number of electrons
- when atoms gain or lose electrons they form electrically charged particles called ions
- loss make a +ion
- gain makes a -ion
- electrons are negative
- protons are positive
- neutrons have no charge (neu-tral)
- isotopes
- the number of protons in the nucleus of an atom is called the atomic number and is at the bottom of the symbol on the table
- the total number of protons and neutron is called the atomic mass and is at the top of the symbol on the table
- isotopes have the same mass number but a different atomic number
- the number of protons in the nucleus of an atom is called the atomic number and is at the bottom of the symbol on the table
- the total number of protons and neutron is called the atomic mass and is at the top of the symbol on the table
- isotopes have the same mass number but a different atomic number
- isotopes have the same mass number but a different atomic number
- the total number of protons and neutron is called the atomic mass and is at the top of the symbol on the table
- the number of protons in the nucleus of an atom is called the atomic number and is at the bottom of the symbol on the table
- isotopes have the same mass number but a different atomic number
- the total number of protons and neutron is called the atomic mass and is at the top of the symbol on the table
- the number of protons in the nucleus of an atom is called the atomic number and is at the bottom of the symbol on the table
- relative atomic mass
- relative atomic mass is a convenient way to know how big an atom is without going into miniscule numbers
- carbon has an Ar of 12, so atoms with an Ar of less than twelve are smaller than carbon
- chlorines Ar is an average of the different isotopes of chlorine
- carbon has an Ar of 12, so atoms with an Ar of less than twelve are smaller than carbon
- Calculating Ar from isotopic abundance:
- relative atomic mass is a convenient way to know how big an atom is without going into miniscule numbers
- electrons and periodic table columns
- the electrons in the outer shell are always the same as the group number
- the period number is the same as the number of OCCUPIED shells
- structure of the atom
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