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Cell biology
Biological molecules
Organisation
Infection and response
Energy transfers (a2 only)
Homeostasis and response
Responding to change (a2 only)
The control of gene expression (a-level only)
Substance exchange
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
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1c the tudors: england, 1485-1603
1l the quest for political stability: germany, 1871-1991
Inter-war germany
1f industrialisation and the people: britain, c1783-1885
Britain & the wider world: 1745 -1901
2n revolution and dictatorship: russia, 1917-1953
2j america: a nation divided, c1845-1877
The cold war
World war two & the holocaust
World war one
Medieval period: 1066 -1509
The fight for female suffrage
2m wars and welfare: britain in transition, 1906-1957
2d religious conflict and the church in england, c1529-c1570
Britain: 1509 -1745
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07/03/2023
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ATOMS atoms Everything is made up of atoms. 99% of our body is made up of hydrogen,carbon, nitrogen and Oxygen atoms. a single cell contains around 1 trillion atoms. each individual atom is made up of multiple smaller particles. ions: an atom that has gained or lost electrons. when an atom gains or loses electrons therefore making the charges unbalanced the atom is then called an ion instead. PARTICLE PROTON Neutrons: They are positively charged and are in the nucleus along with the protons NEUTRON ELECTRON Electrons:a negatively charged subatomic particle that can be bound or not bound to an atom . The amount of electrons in an atom decide what element the atom is. Protons: provides the attractive electrostatic central force that binds the atomic electrons, the number of protons in the nucleus defines the element. atomic structure: RELATIVE MASS Electron Orbits a central nucleus makes up each atom atoms orbit around the nucleus in rings called shells. The nucleus itself is made up of protons and neutrons. Electron 1 1840 Proton Neutron Nucleus CHARGE 88 Science Facts O (NEUTRAL) " Summery: atoms are the particles that make up everything and anything that takes up space and anything with a mass, it's made up of a central nucleus That holds neutrons and protons with electrons orbiting in shells outside the nucleus. ATOMS atoms Everything is made up of atoms. 99% of our body is made up of hydrogen,carbon, nitrogen and Oxygen atoms. a single cell contains around 1 trillion atoms. each individual atom is made up of multiple smaller particles. ions: an atom that...
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has gained or lost electrons. when an atom gains or loses electrons therefore making the charges unbalanced the atom is then called an ion instead. PARTICLE PROTON Neutrons: They are positively charged and are in the nucleus along with the protons NEUTRON ELECTRON Electrons:a negatively charged subatomic particle that can be bound or not bound to an atom . The amount of electrons in an atom decide what element the atom is. Protons: provides the attractive electrostatic central force that binds the atomic electrons, the number of protons in the nucleus defines the element. atomic structure: RELATIVE MASS Electron Orbits a central nucleus makes up each atom atoms orbit around the nucleus in rings called shells. The nucleus itself is made up of protons and neutrons. Electron 1 1840 Proton Neutron Nucleus CHARGE 88 Science Facts O (NEUTRAL) " Summery: atoms are the particles that make up everything and anything that takes up space and anything with a mass, it's made up of a central nucleus That holds neutrons and protons with electrons orbiting in shells outside the nucleus.