AQA unit 1 chemistry Flashcards
(23 cards)
what is an element?
a substance made of one type of atom
what is a compound?
a substance made of two or more types of atom chemically bonded together
what is a mixture?
two or more elements and compound not chemically bonded together
is oxygen an element, compound or mixture?
an element
is carbon dioxide an element,compound or a mixture
a compound
is air an element, compound or a mixture
a mixture
how many carbon atoms are in CO2
one carbon atom
how many chlorine atoms are in Al3CI6
six chlorine atoms
how many different elements are in C6H12O6
three different elements (carbon, hydrogen, oxygen)
what is the centre of an atom called
the nucleus
what are three subatomic particles in an atom
protons, electrons and neutrons
where are protons and neutrons located in the atom
in the nucleus
where are electrons located in the atom
the the shells (energy levels)
what is the charge of a neutron
zero
what is the mass of a proton, electron ans neurton? (HINT - PEN 101)
1,0,1
how many electrons can u fit in the first three shells?
2,8,8
who came up the with plum pudding model
JJ Tomson
what said that the atom had a dense nucleus with electrons in orbit
ernest Rutherford
who said that the electrons were in shells
niels bohr
who discovered the neutron
james chadwick
what are the elements in group 1 called
alkali metals
what are the elements in group 7 called
halogens
what are the elements in group 0 called
nobel gases
