Karteikarten
National 5 Chemistry-Atomic Theory
Karten in diesem Stapel (14)
- 1What are the sub-atomic particles that atoms are made up of called?Protons, neutrons and electrons.
- 2What are electrons?Negatively charged particles that spin around the positive centre of the atom in cirlces called energy levels. Their mass is zero.
- 3What are protons?Positively charged particles that are contained in the nucleus of the atom. Thy have a relative mass of one.
- 4What are neutrons?Neutrons are also contained in the nucleus of the atom, but have no charge. They also have relative mass of one.
- 5Why does the nucleus have an overall positive charge?It contains only protons (positive) and neutrons (neutral).
- 6Why do atoms have no overall charge?They contain equal numbers of positive protons and negative electrons.
- 7What does the atomic number tell you about an element?How many protons there are in an atom of that element.
- 8What is the mass number of an atom equal to?The number of protons plus the number of neutrons.
- 9What does the electron arrangement of an atom show?How the electrons are arranged in the energy levels.
- 10What are isotopes?Atoms with the same atomic number, but different mass number.
- 11What can the RAM be used for?To give an indication of the relative abundance of isotopes in a sample
- 12What is an ion, and how are they formed?An ion is a charged particle, formed when atom gains or loses electrons due to an imbalance of electrons to protons.
- 13Metal atoms...to form... Non-metal atoms...to form...Lose electrons, positive ions
Gain electrons, negative ions - 14Why do atoms gain or lose electrons?They want to be like the noble gases which have a stable electron arrangement, and therefore won't react.
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- CfE Higher Chemistry (Unit1-Chemical Changes and Structure) Karteikarten am National 5 Chemistry-Atomic Theory , erstellt von NinaJasT am 20/12/2014.
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