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A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it? K Zr Ca Sc?

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  • A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it? K Zr Ca Sc?


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A single atom of an element has 21 neutrons, 20 electrons, ... 20 electrons, and 20 protons. Which element is it? K Zr Ca Sc 1.
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Positive: 82 %
Chemical element symbols ... but it is not composed of atoms of chemical elements because it contains no protons, neutrons, or electrons. ... K: Ca: Sc Ti ...
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Positive: 79 %

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The modern atomic theory states that atoms of ... neutrons, and electrons. Each element has its own ... a potassium atom with 19 protons and 20 neutrons;
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Positive: 82 %
Number of Protons/Electrons: 21 Number of Neutrons: 24 ... Density @ 293 K: 2.989 g/cm 3 Color: silvery ... Chemical Element.com - Scandium.
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Positive: 77 %
5 The nuclear atom; Protons and neutrons; ... Ne Na Mg Al Si P S Cl Ar K Ca ... of chlorine is 35.45 and the element has two stable isotopes 17 ...
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Positive: 63 %
The number of protons defines the type of element. If an atom has six protons, ... element eighteen, has two electrons in the K shell, ... Sc #21: 2 8 18 ...
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Positive: 40 %

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