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Chemistry > C1; Atomic Structure & Periodic Table > Flashcards

C1; Atomic Structure & Periodic Table Flashcards

1
Q

What is an atom

A

The smallest part of an an element

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2
Q

What is a molecule

A

Two or more atoms chemically bonded together

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3
Q

What is the conservation of mass

A

When during a reaction, the atoms in the reactants are rearranged into different compounds. Therefore mass is never gained or lost in a chemical reaction

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4
Q

What is an element

A

A substance made from only one type of atom

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5
Q

What is a compound

A

A substance made up of only 1 atom

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6
Q

What is a mixture

A

Two or more substances mixed together, but no not react with together. A mixture is not a pure substance

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7
Q

What i balancing equations

A

When you change the amount of molecule in a reaction so that the reactants and the product are equal

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8
Q

What are the 5 five methods of separating mixtures

A

Filtration,crystallisation, simple distillation, fractional distillation and chromatography

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9
Q

What is filtration

A

Using a filter to separate an insoluble solid from a liquid

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10
Q

What is crystallisation

A

When the liquid (solvent) evaporates away leaving the soluble solid crystals (solute) behind

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11
Q

What is Simple distillation

A

Separates a liquid from a solution. The solution is heated, it evaporates and then condenses for collection

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12
Q

What is Fractional distillation

A

Separates multiple liquids from a solution, based on boiling points

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13
Q

What is Chromatography

A

Separation soluble substances from one another

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14
Q

Who was John dalton

A

John dalton proposed atoms are tiny hard spheres that cannot be split and all matter was made of atoms

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15
Q

When was the first model of the atom created

A

In 1805 by John dalton

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16
Q

Who was JJ Thomson

A

Proposed that an atom was a sphere of positive charge with negatively charged electrons spread through it

17
Q

Whats was the name of JJ thomsons model and when was it created?

A

It was called the plum pudding model and was made in 1897

18
Q

What was the expriment that Ernest Rutherford did

A

He fired alpha particles at a very thin piece of gold foil

19
Q

What did erenst Rutherford conclude

A

Because most of the particles went straight through, most of the atom was empty space. And that some of the alpha particles shot back meaning that there was a small nucleus in the centre

20
Q

When did Ernest Rutherford discover the nucleus and what was it called

A

The nuclear model made in 1909

21
Q

What did Neil’s Bohr discover

A

He adapted the nuclear model and discovered that electrons orbit the nucleus at specific distances called electrons shells

22
Q

When did Neil’s Bohr discover electron shells

A

In 1913

23
Q

What did James Chadwick discover

A

He provided evidence to show the distance of neutrons

24
Q

When did James Chadwick discover the neutron

A

1932

Chemistry (1 decks)

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