AQA unit 1 chemistry Flashcards
(25 cards)
what is an element
a substance made of one type of atom
what is a compound
a substance made of two types of atoms chemically bonded together
what is a mixture
two or more elements and compounds not chemically bonded together
is oxygen a element, compound or mixture
an element
is carbon dioxide an element, compound or mixture
a compound
is air an element, compound or a mixture
a mixture
how many carbon atoms are in CO2
one
how many chlorine atoms are in Al3Cl6
six
how many different elements are in C6H12O6
three different elements (carbon, hydrogen, oxygen)
what is a centre of a atom called
nucleus
what are the three subatomic particles in a atom
protons, electrons and neutrons
what are protons and neutrons located in the atom
in the nucleus
where are electrons located in the atom
in the energy shells
what is the charge of a neutron
0, no charge
what is the mass of a proton, electron and neutron (HINT PEN 101)
1,0,1
how many electrons can you put in the first 3 shells
2,8,8
who came up with the plum pudding model
JJ Thompson
who said that the atom had a dense nucleus with electrons in orbit?
Rutherford
who said that the electrons where in shells
Niels Bohr
who discovered the neutron
James Chadwick
what are the elements in group one called
alkali metals
what are the elements in group seven called
halogens
what are the elements in group zero called
noble gasses
why are the noble gasses group zero unreactive
they all have a full outer shell
