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Proton:
has a positive charge, found in nucleus
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Neutron:
has no charge, found in nucleus
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Electron:
has a negative charge, found in orbit around nucleus
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mass for electron?
1/1840
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What is a series circuit?
In series circuit, each component follows the previous one without any breaks
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if the north poles of two magnets come close what happens?
they repel from each other
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what happens if a south pole of one magnet comes close to a north pole of another magnet?
they attract to one another
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What are materials than can be magnetised called?
magnetic materials
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what do magnetic materials contain at least one of?
Iron,nickel or cobalt
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how many elements are there according to the last check?
118
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what group are the alkaline earth metals?
group 2
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what group are the Halogens?
group 7
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what group are the Noble gases?
group 8
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What is the big number on an element?
the mass number, it is the amount of protons+ neutrons in an element
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what is the small number on an element?
the atomic number, it is the amount of protons or electrons in an element
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what is the maximum number of electrons in the first shell?
2
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what is the maximum number of electrons in the second shell?
8
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what is the maximum number of electrons in the third shell?
8
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what is the maximum number of electrons in the fourth shell?
18
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what is a bond between a metal and non metal called?
ionic bond
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What is an atom called when it gains or loses electrons?
an ion
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what is a bond between non metal and a non metal called?
covalent bond
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what is a bond between two metals called?
metallic bonding
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what are microbes?
Microbes are very small organisms which make up the groups Bacteria, Viruses and Fungi
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Bacteria:
Bacteria are single celled organisms. They are different from plants and animals because they do not have a nucleus.
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Viruses:
Viruses are extremely small and cannot be seen on a regular microscope. Viruses cause diseases like Flu,cold,AIDS and chicken pox. They are smaller than a single cell.
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Fungi:
Fungi ranges from single celled organisms like yeast to large multi cellular organisms like Mushrooms.Fungi likes dark, damp, warm conditions.
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what is the word equation for respiration?
Gluecose + Oxygen to Carbon dioxide + water + energy
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what is the word equation for anaerobic respiration IN YEAST?
Glucose to carbon dioxide + ethanol + energy
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what is the word equation for anaerobic respiration in our muscles?
Glucose to Lactic acid + energy
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what does lactic acid cause?
cramps in our muscles
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what two ways can microbes cause diseases?
- Destroy living tissue
- poisoning food
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How do you kill microbes?
- HeatingĀ
- disinfections
- anticeptics
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