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GCSE Core Chemistry Yr 9

bronwyn831 Chemistry GCSE Inglés 3,8Valoración media 3,8 de 5 (13 valoraciones) 15 fichas

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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.