Karteikarten
GCSE Core Chemistry Yr 9
Karten in diesem Stapel (15)
- 1How many different types of atom are there?about 100
- 2What is an ELEMENT?a substance made purely up of 1 type of atom. commonly found on the periodic table.
- 3What is a MOLECULE?2 or more atoms of the same kind joined together
- 4What is a COMPOUND?2 or more atoms of different types chemically joined together.
- 5What are the 3 states of matter?solid
liquid
gas - 6What is special about each group in the periodic table?it contains elements of similar chemical properties.
- 7What is the nucleus of an atom surrounded by?electrons
- 8What 2 things are in the nucleus of an atom?protons and neutrons
- 9If an atom has 8 protons how many electrons does it have?8
- 10What is the relative charge of a a) neutron b) electron c) protona) 0
b) -1
c) +1 - 11What is the name for the 'number of protons' each atom has in an element?the atomic number
- 12What is the 'mass number' of an atom?the number of protons + neutrons in a nucleus.
- 13How are atoms arranged in the periodic table?in order of their atomic number.
- 14What does each shell represent?the different energy levels. the shell with the lowest energy is nearest to the nucleus.
- 15How can we tell how many electrons are in the outer shell of an atom?by looking at which group its in. i.e Hydrogen is in group 1 and has 1 electron in its outer shell.
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- 3/3 topic. to be used to study for end of yr9 year exam.
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