Flashcards
Atom Structures_2
Flashcards do conjunto (9)
- 1what are elements made up of?atoms
- 2what does an atom have in the middle of it?a nucleus
- 3what does a nucleus contain?It contains positively charged particles called protons, and neutral particles called neutrons.
- 4what are electrons?Electrons are negatively charged particles which move around the nucleus in circular paths called orbits, shells or energy levels.
- 5what is a atomic number?number of protons of an atom
- 6what does the number of prtons equal?Number of protons equals the number of electrons in an atom; therefore, an atom is electrically neutral.
- 7what are Isotopes?Isotopes are atoms of the same element having different mass numbers.
- 8what is The distribution of electrons in various shells / energy levels?The distribution of electrons in various shells or energy levels in an atom is called the electronic configuration of that atom.
- 9what holds atoms together?The force of attraction that holds atoms together in a molecule is known as a chemical bond.
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- FlashCards sobre Atom Structures_2, criado por Heena Ahmed em 28-06-2015.
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- Criado por Heena Ahmed · 28 jun 2015
- Copiado por Heena Ahmed · 28 jun 2015
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