3.2 Atomic structure
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What are the three subatomic particles that an atom contains?
proton neutron electron
How is an atom neutrally charged?
same number of protons and electrons charge cancels out
What is the relative mass of a proton?
1
What is the relative mass of a neutron?
1
What is the relative mass of an electron?
0.001
What is the relative charge of a proton?
+1
What is the relative charge of a neutron?
0
What is the relative charge of an electron?
-1
Where are protons and neutrons found?
in the nucleus
Where are electrons found?
energy shells/levels around the nucleus
What is the atomic number?
number of protons
What is the mass number?
number of protons and neutrons
Define isotope
atom with same number of protons but different number of neutrons therefore, different mass number
Does an isotope behave differently to a normal atom?
no - same number of electrons
What is the relative atomic mass?
average mass of an atom of an element, taking into account the different masses of each isotope
What is the formula for relative atomic mass?
(abundance/100 x mass number) + (abundance/100 x mass number)
What is the maximum electronic configuration?
2,8,18….
How many electrons in the outer shell does an element in period 3 group 5 have?
5
How many electron shells does an element in period 3 group 5 have?
3