what is the n/p ratio of 222^Ra ?Also find the atomic number
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The atomic number,
Z
, is the number of protons, massive positively charged particles, contained in the element's nucleus.
Z
defines the identity of the element. If
Z
=
1
, the element is hydrogen; if
Z
=
2
, the element is helium; if
Z
=
19
, the element is potassium; if
Z
=
92
, the element is uranium.
How do I know this? Well, in every examination of chemistry and physics you will ever sit, you will be given a Periodic Table, which lists the atomic number and atomic mass of EVERY element. Of course, you will have to be able to use the table, so get cracking.
The atomic number,
Z
, is the number of protons, massive positively charged particles, contained in the element's nucleus.
Z
defines the identity of the element. If
Z
=
1
, the element is hydrogen; if
Z
=
2
, the element is helium; if
Z
=
19
, the element is potassium; if
Z
=
92
, the element is uranium.
How do I know this? Well, in every examination of chemistry and physics you will ever sit, you will be given a Periodic Table, which lists the atomic number and atomic mass of EVERY element. Of course, you will have to be able to use the table, so get cracking.
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