AQA GCSE CHEMISTRY (9-1) GUARANTEED SUCCESS
1. What is the fundamental building block of matter, and what are its characteristics?
Answer: Atoms are tiny particles that make up everything around us, with a radius of about 0.1
nanometers (1x10^-10 meters). They are incredibly small, with a 50p...
AQA GCSE CHEMISTRY (9-1) GUARANTEED SUCCESS
1. What is the fundamental building block of matter, and what are its characteristics?
Answer: Atoms are tiny particles that make up everything around us, with a radius of about 0.1
nanometers (1x10^-10 meters). They are incredibly small, with a 50p piece containing approximately 77
quadrillion atoms.
2. Can you compare the size of atoms to other objects?
Answer: Yes, atoms are so tiny that they are almost unimaginable in size. To put it into perspective, the
nucleus of an atom has a radius of about 1x10^-14 meters, which is roughly 1/10,000th the size of the
entire atom.
3. What is the structure of an atom composed of?
Answer: The nucleus is at the center of an atom, containing protons and neutrons. Protons have a
positive charge, while neutrons have no charge. The electrons orbit around the nucleus in shells,
covering a significant portion of space.
4. Why do atoms have no overall charge?
Answer: The number of protons always equals the number of electrons in an atom, with protons having
a charge of +1 and electrons having a charge of -1. This balance cancels out, resulting in an overall
neutral charge.
5. What are the relative charges and masses of protons, neutrons, and electrons?
Answer: Relative Charge: Proton = +1, Neutron = 0 (neutral), Electron = -1; Relative Mass: Proton = 1,
Neutron = 1, Electron = very small.
6. What defines an element?
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