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What is the atomic number of a chemical element?

The number of neutrons in the atom's nucleus
The number of atoms
The number of protons in the atomic nucleus
The number of electrons in the atomic nucleus
The atomic number or proton number of a chemical element is the number of protons found in the nucleus of an atom. It is identical to the charge number of the nucleus. The atomic number uniquely identifies a chemical element.
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Answers by country

The number of neutrons in the atom's nucleus
The number of atoms
The number of protons in the atomic nucleus
The number of electrons in the atomic nucleus
answers
flagSwitzerland
10%
0%
90%
0%
10
flagthe Netherlands
0%
14%
80%
4%
21
flagMalaysia
20%
0%
80%
0%
10
flagAustralia
14%
7%
71%
7%
42
flagPakistan
9%
3%
71%
15%
32
flagNigeria
4%
6%
68%
20%
50
flagGreece
7%
7%
64%
21%
14
flagthe United States
12%
12%
60%
13%
176
flagthe United Kingdom
20%
6%
59%
13%
83
flagIndia
9%
13%
58%
16%
302
flagAustria
22%
13%
52%
8%
36
flagGermany
16%
13%
51%
16%
206
flagPoland
14%
16%
50%
17%
2751
flagthe Philippines
30%
11%
38%
19%
26

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