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The Periodic Table: Crash Course Chemistry #4

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Hidden info on Periodic Table To Find Atomic Info

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Hidden info on Periodic Table To Find Atomic Info

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1.) Mass of Protons = Mass of Neutrons
2.) Mass Number = Number of protons + Number of Neutrons
3.) Can estimate the Mass Number by rounding to the nearest whole number.
4.) Atoms are electrically neutral- Number of electrons = Number of Protons

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Atoms are made up of three things:
1.)Protons (+)
2.)Neutrons(o)
3.) Electrons(-)

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An atom with high electronegativity attracts electrons strongly, while an atom with low electronegativity attracts them weakly.

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Highest and lowest Electronic Negativity levels

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Highest and lowest Electronic Negativity levels

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Francium has the lowest electron negativity level of 0.7. Titanium has an electron negativity of 1.4. And Fluorine has the highest electron negativity of 4.

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The Pauling  Scale of Electron Negativity.

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The Pauling  Scale of Electron Negativity.

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Electronegative is a measure of the tendency of an atom to attract a bonding pair of electrons. The Pauling scale is the most commonly used. Fluorine is the most electronegative element and is assigned a value of 4 and values range down to cesium.

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This is the atomic build for titanium.

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An Ion is an electrically charged particle produced by removing electrons from a neutral atom to get a positive ion or adding electrons to a neutral atom to give a negative ion. When an ion is formed, the number of protons does not change.

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Atoms are neutral and contain the same numbers of protons and electrons.

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Atomic number: 22

Atomic mass: 47.867

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The mass of an atoms chemical make up is expressed in atomic mass units or grams. It is the approximate equivalent to the number of protons and neutrons in the atom .

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The atomic number indicates the number of electrons in the atoms of an element.