What is the relative charge and mass of 1) neutron 2) proton 3) electron
I)Neutron = charge 0, mass 1 - II)Proton = charge 1, mass 1 - III.) electron = charge -1, mass 1/200
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What is an isotope
Atoms with the same number of protons and electrons and a different number of neutron
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How do you calculate the RAM from the relative abundance of isotopes
(massXpercent/abundance) + (massXpercent/abundance) DIVIDED BY 100 or the SUM of the relative abundances
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What is an ion
Ions are electrically charged particles formed when atoms lose or gain electrons.
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What is an ionic bond
the attraction between two oppositely charged ions
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Describe an ionic bond and how they are attracted etc
The transfer of electrons in order to form ions (charged particles) between a metal and a non metal. The opposite charges create a strong electrostatic attraction
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Why do ionic compounds have high mpts and bpts
Giant ionic structures are held together in a closely packed lattice structure held together by strong electrostatic attraction between oppositely charged ions. Lots of energy is required to break this attraction
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Which would have a higher mpt: a lattice of 1- and 1+ ions or a lattice of 2+ and 2- ions?
2+ and 2-
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What is a covalent bond
The sharing of electrons between two non metals in order to achieve a full outer shell. There is an attraction between the nuclei of the atoms involved.
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Covalent bonds produce what type of structures
Simple molecular substances OR giant covalent structures
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Why do simple molecular substances have low mpts
The forces of attraction beween the molecules are very weak and so are easily parted from one another (WEAK INTERMOLECULAR FORCES)
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What is the difference between giant covalent and giant ionic structures
No charged ions in covalent
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Why do giant covalent structures have high mpts
There are LOTS of strong covalent bonds so lots of energy is required to break them
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Properties of giant covalent structures? Important examples?
1.)Don't conduct electrictty even when molten 2.) Usally insoluble in water 3.)Diamond, graphite and silicon dioxide
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Which giant covalent structure conducts electricity and why
Graphite: Each carbon atom forms only 3 covalent bonds, creating layers which slide over each other (UFEFUL LUBRICANT) which leaves free electrons and makes it the only non metal that is a good conductor of electricity
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Other cards in this set
Card 2
Front
What is an isotope
Back
Atoms with the same number of protons and electrons and a different number of neutron
Card 3
Front
How do you calculate the RAM from the relative abundance of isotopes
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