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atomic number
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The
Simple English Wikipedia
has an article on:
Atomic number
Pronunciation
change
IPA
(
key
)
:
/əˈtɒm.ɪk//ˈnʌm.bɚ/
Noun
change
Singular
atomic number
Plural
atomic numbers
(
countable
)
The number of
protons
in an
atom
is the
atomic number
. It is also the
position
in the
periodic table
of
elements
.
Hydrogen
has an
atomic number
of 1. It has 1 proton, and is the first element in the periodic table.
Heavy elements, such as
gold
have a high
atomic number
.
Related words
change
neutron number
mass number
atomic
atom