Karteikarten
Science: Chemistry A2
Karten in diesem Stapel (11)
- 1What does the atomic number tell you?How many protons there are.
- 2What does the mass number tell you?The total number of protons and neutrons.
- 3What do atoms contain?Protons,
Neutrons and
electrons. - 4How do you get the number of neutrons in an atom?Subtract the atomic number from the mass number.
- 5What are the masses of a proton and a neutron?They have a mass of 1
- 6Whats the mass of an electron?Very small.
Relative mass is 0.0005 - 7How are compounds formed?When the atoms of two or more elements are chemically combined together.
E.g. Carbon dioxide is a compound formed from a chemical reaction between carbon and oxygen. It is then difficult to separate the two original elements. - 8Explain what is meant by the term isotope.Isotopes are: different atomic forms of the same element which have the SAME number of PROTONS but a different number of NEUTRONS.
- 9What do isotopes have?The same atomic number but different mass numbers
- 10Name a pair of popular isotopes.Carbon 12 and Carbon 14.
C 12 has 6 protons, 6 electrons, 6 neutrons.
C 14 has 6 protons, 6 electrons, 8 neutrons. - 11What do atoms of the same element have?The same number of protons. Therefore, atoms of different elements will have different numbers of protons.
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- Karteikarten am Science: Chemistry A2, erstellt von Kellieanne am 01/10/2013.
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- Kellieanne
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