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Q 1/3
Score 0
The nucleus of an atom of Na-23 contains
30
11 protons and 23 neutrons
11 protons and 12 neutrons
12 protons and 11 neutrons.
11 protons and 11 neutrons
Q 2/3
Score 0
The mass spectrum for a sample of a metal is provided. The relative atomic mass of the metal is:
30
63.2
63.4
63.6
63.8
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3 questions
Q.
The nucleus of an atom of Na-23 contains
1
30 sec
Q.
The mass spectrum for a sample of a metal is provided. The relative atomic mass of the metal is:
2
30 sec
Q.
A compound was analysed and found to contain
1.45 g carbon 0.482 g hydrogen 1.69 g nitrogen
[Relative atomic masses: C = 12; H = 1; N = 14]
The empirical formula of the compound is
