Flashcards

Science: Chemistry A2

Kellieanne Inglês 11 flashcards

Flashcards do conjunto (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.

Descrição: FlashCards sobre Science: Chemistry A2, criado por Kellieanne em 01-10-2013.
Criado por: Kellieanne
Visualizações: 22
Tags: gcse
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