Atomic Structure

Created by: Arun10
Created on: 28-03-18 22:55

What three particles is the atom made from?

Protons Neutrons Electrons

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What is at the centre of the atom?

Protons and neutrons (nucleons)

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What is orbiting the nucleus?

The electrons.

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Why is most of the atom empty space?

As electrons orbit the nucleus at relatively large distances.

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Proton's Relative Charge

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Protons Relative Mass

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Why is it better to use relative units than C and kg.

The charge and mass of atomic particles are so very tiny its just much easier to deal in relative units.

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Neutron Relative Charge

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Neutron Relative Mass

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Electron Relative Charge

-1

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Electron Relative Mass

0.0005

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What is the Atomic (Proton) Number?

Number of protons in nucleus. Symbol Z. Proton number defines the element- no two different elements will have same number of protons.

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In a neutral atom?

Number of electrons equals number of protons.

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Element's reactions and chemical behaviour depend on what?

Number of Electrons.

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What does the proton number tell you a lot about?

Chemical Properties.

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What is a Mass (Nucleon) Number?

Tells the number of protons and neutrons in nucleus. symbol A. Since each proton or neutron has a relative mass of approx 1 and electron has very little mass, the mass number gives a good approx of the atom's mass.

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What does the nuclide notation show?

Top number- Mass Number Bottom Number-Atomic Number

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What is Specific Charge of a partice?

Ratio of its charge to its mass, given coulombs per kilogram (CKg^-1)

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Specific Charge Formula

Charge vs Mass.

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What are isotopes?

Atoms with same number of protons but different number of neutrons.

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Changing the number of neutrons doesn't affect?

The atoms chemical properties.

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How does the number of neutrons affect the stability of the nucleus?

In general the greater the number of neutrons compared with the number of protons, the more unstable the nucleus. Unstable nuclei may be radioactive and decay to make themselves more stable.

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Three isotopes of hydrogen?

Protium Deuterium Tritium

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What is isotopic data?

The relative amounts of different isotopes of an element present in a substance. There are many different isotopes that have both important uses., both on their own and within substances.

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Other cards in this set

Card 2

Front

What is at the centre of the atom?

Back

Protons and neutrons (nucleons)

Card 3

Front

What is orbiting the nucleus?

Back

Card 4

Front

Why is most of the atom empty space?

Back

Card 5

Front

Proton's Relative Charge

Back

View more cards

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