Flashcards
1_Science 1.3
Flashcards do conjunto (20)
- 1What is a atom made up of?Neutrons, Protons and Electrons.
- 2How does an atom look like?An atom looks like a cluster of particles surrounded by a cloud of electrons.
- 3How much heavier are the neutrons and protons compared to the electrons?1800 times heavier.
- 4What can the electron cloud be broken down to?Electron shells.
- 5How many electrons can be contained in the first, second and third electron shells?2, 8 and 18.
- 6How much smaller is the nucleus compared to the electron shells?100 to 1000 times.
- 7What is the cluster of protons and neutrons called?Nucleus.
- 8How do scientists "see" atoms?With a Scanning Tunneling Microscope (STM).
- 9Where does the word atom come from?Atomos. The word originates from greek and means something that is so small it can't be divided.
- 10What is the charge of an atom?0.
- 11Why is that?There is an equal number of protons and electrons in a atom.
- 12How do scientists learn what is in a atom?By smashing them apart.
- 13How many known types of atoms are there?117.
- 14Who was John Dalton?A British scientist.
- 15What were the 4 points in Dalton's atom theory?All matter is made up of atoms.
Some forms of elements contain 1 atom.
Some elements contain more then 1 atom.
Atoms can't be destroyed or created. - 16What is a scientific model?It is a simplified idea that can be used to help make predictions.
- 17What is a atomic number?The number of protons in an atom
- 18What is a mass number?The number of protons and neutrons in an atom.
- 19What is the name of the force that keeps atoms in place?Strong force.
- 20What are some atom properties?Its size and how it reacts with other atoms.
Informações
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- ? Science FlashCards sobre 1_Science 1.3, criado por Mustafa Ati em 10-05-2016.
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- Mustafa Ati
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- Criado por Mustafa Ati · 10 mai 2016
- Copiado por Mustafa Ati · 10 mai 2016
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