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Lithium has an atomic number of 3.

Lithium's Atomic Mass is 6.9.

The atomic number refers to the number of protons in the nucleus of an element. As elements are electronically neutral the atomic number also refers to the number of electrons in a normal atom of that element.

The atomic mass is an average and can be said to refer to the combined mass of the protons and neutrons in the nucleus (protons and neutrons both having an atomic mass of 1).

Lithium, therefore, has 3 protons, 3 electrons and 4 neutrons (on average).

Lithium is in group 1 which means it is an alkali metal.

Being in group 1 also means that Lithium has only one electron in its outer shell.

Alkali metals are highly reactive because they only need to get rid of one electron in an ionic bond in order to have a full outer shell. As one travels down the Periodic Table the number of electron shells increase and so too does the distance an outer electron is from the nucleus. This increase in distance means the nucleus' hold on the outer electrons is diminished and thus the element will give up its outer electrons easier. This, in turn makes the alkali metals further down the table more reactive than those higher up.

Alkali metals are so called because when they react with water they form an alkali. Lithium reacting with water will form lithium hydroxide.

Lithium is a metal with a relatively low density that floats on water and will react violently with water and discolour rapidly in air.

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14y ago
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12y ago

This is a chemistry question. Lithium is a metal element. Lithiums atomic number is 3.

Lithium's atomic number is 3.

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14y ago

The atomic number of lithium was and still is 3!

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9y ago

Lithium is a metal element. Atomic number of it is 3.

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8y ago

Lithium is a s block element. Atomic number of it is 3.

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9y ago

This is a chemistry question. Lithium is a metal element. Lithiums atomic number is 3.

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12y ago

Lithium has 3 protons.

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12y ago

Lithium's atomic number is 3.

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8y ago

The atomic number of lithium is 3.

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Q: What is the proton number of the element lithuim?
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