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Science > The Atom > Flashcards

The Atom Flashcards

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1
Q

Definition of Atom

A

The smallest unit of matter; everything is made up of atoms

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2
Q

Definition of an Element

A

A substance composed of one type of atom

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3
Q

Definition of Compound

A

A substance composed of two or more elements that are chemically bonded together in fixed proportions

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4
Q

Definition of a Molecule

A

Two or more atoms that are chemically joined together

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5
Q

Definition of Periodic Table

A

The arrangement of all known elements, arranged in order of increasing atomic number

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6
Q

Is a period a row or column?

A

Row

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7
Q

Is a group a row or column?

A

Column

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8
Q

Who is Mendeleev?

A

A Russian chemist that proposed the modern periodic table

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9
Q

What group are alkali metals?

A

Group 1

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10
Q

What group are Halogens?

A

Group 7

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11
Q

What group are Noble Gases?

A

Group 0

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12
Q

What is an Isotope?

A

An element with the same number of protons but different number of neutrons

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13
Q

What are Ions?

A

An atom that has lost or gained an electron or multiple electrons

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14
Q

Relative Charge of Proton, Neutron and an Electron in order

A

+1, 0, -1

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15
Q

Relative Mass of Proton, Neutron and an Electron in order

A

1, 1, Almost 0

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16
Q

Order of maximum number of electrons in each electron shell

A

2, 8, 8 etc

17
Q

What is the electron configuration of an element with the atomic number of 53

A

2.8.8.8.8.8.8.3

18
Q

What does a small s, g, l and aq next to a chemical mean in order?

A

It means the chemical is a solid, gas, liquid and a substance that can be dissolved in water (aqueous)

19
Q

What are the signs of a chemical reaction?

A

Gas being produced, Colour change, Temperature change, Light (energy) given off

20
Q

How to balance Fe2O3 + C —> Fe + CO2

A

2Fe2O3 + 3C —> 4Fe + 3CO2

21
Q

How many electrons, protons and neutrons does iron have? (Atomic number: 26, Atomic mass: 56)

A

Electrons = 26, Protons = 26, Neutrons = 30

22
Q

Who created the Plum Pudding model?

A

J.J Thompson

23
Q

What did J.J Thompson discover?

A

The electron

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