Flashcards
2.1 yr9
Cards in this deck (26)
- 1Atoms 2.1Sarina Rezaie 9a
- 2What is an atom?Atoms are the fundamental building blocks of all materials.
- 3Can atoms be seen?Atoms vary very small and can't be seen with even the most powerful microscope. To see atoms, scientists use a special microscope called the scanning tunnelling microscope or STM.
- 4How many known atoms are there?There are 118 known atoms.
- 5How many of the known atoms are human-made?98
- 6How many of the atoms are natural?20
- 7What are molecules?Molecules are clusters of atoms that makes up an element or a compound
- 8What are crystal lattices?A grid like structure of atoms or ions which each particles bonded to all of its neighbouring atoms.
- 9What are elements?A substance made up of only one atom
- 10How is carbon a unique elementCarbon atoms can form extremely large molecules
- 11Which is the only non-metallic elementCarbon
- 12What is an example of metallic elements?Copper and gold
- 13What are compounds?A pure substance that is made up of 2 or more different atoms
- 14What is a subatomic particles?The particles that atoms are made of-protons, neutrons and electrons
- 15What are protons?A positively charged particle found in the nucleus of an atom
- 16What are neutrons?A particle with no electric charge
- 17What are electrons?A small, negatively charged particle
- 18What is a nucleus?A cluster of neutrons and protons at the centre of an atom.
- 19What is an electron cloud?The region of negative charge surrounding the nucleus, containing electrons.
- 20What is an atomic number?The number of protons in a nucleus; the atomic number determines what type of atom it is
- 21What is a mass number?The number of protons and neutrons in an atom
- 22What does being neutral mean?Having no overall charge
- 23What are ions?An atom that has gained or lost an electron
- 24What is a cation?An iron that has fewer electrons than protons and is positivity charged.
- 25What is an anion?An ion that has more electrons than protons and is negatively charged
- 26The end:)
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- Flashcards on 2.1 yr9, created by Sarina Rezaie on 02/05/2020.
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- Sarina Rezaie
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