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Chemistry > Atomic Structure & The Periodic Table > Flashcards

Atomic Structure & The Periodic Table Flashcards

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1
Q

How do you calculate relative atomic mass (Ar)?

A

(Isotope abundance x Isotope mass number) divided by sum of abundances of all the Isotopes

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2
Q

What are compounds?

A

Substances formed from two or more elements, the atoms of each are in fixed proportions held together by chemical bonds.

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3
Q

What is an isotope?

A

A different form of the same element which have the same number of protons but a different number of neutrons.

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4
Q

Name two methods that a picture can be separated into its compounds and elements.

A

-Filtration
-Crystallisation
-Simple Distillation
-Fractional Distillation
-Chromatography

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5
Q

Why must you use a pencil during Chromatography?

A

Pencil marks are insoluble and won’t dissolve in the solvent.

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6
Q

Isotopes have the same Atomic or Mass Number?

A

Atomic number is the same, Mass number is different.

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7
Q

Define what an element is.

A

A substance only containing atoms with the same number of protons.

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8
Q

What will happen if any of the dyes in the ink are insoluble in the solvent?

A

They will stay on the baseline.

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9
Q

In Nanometres, how big is the radius of an atom?

A

0.1 Nanometres

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10
Q

What does the atomic number tell us?

A

How many protons there are.

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11
Q

Filtration is used if the product is an ….

A

Insoluble solid.

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12
Q

What shape is the filter paper folded in?

A

Cone

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13
Q

Distillation is used to separate which contain..

A

Liquids

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14
Q

Compounds are represented by …

A

Formulas

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15
Q

What does the mass number all us?

A

The total number of protons and neutrons in the atom.

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16
Q

What are the two types of distillation?

A

Simple & Fractional

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17
Q

What colour poisonous gas is Fluorine?

A

Yellow

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18
Q

State properties of the transition metals.

A

Very dense, shiny and strong

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19
Q

Name three alkali metals.

A

-Lithium
-Sodium
-Potassium
-Rubidium
-Caesium
-Francium

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20
Q

What did John Dalton describe atoms as?

A

Solid Spheres

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21
Q

Fill in the blanks. J J Thompson measured …. & …. which showed atoms were smaller than Spheres.

A

Charge & Mass

22
Q

What did the plum pudding model show?

A

The atom as a ball of positive charge with electrons stuck in it.

23
Q

How we’re Alpha particle scattering experiments conducted?

A

By firing positively charged alpha particles at an extremely thin sheet of gold.

24
Q

As you go down group1, are the melting and boiling points increasing or decreasing?

A

Decreasing

25
Q

A metal oxide is formed when which 2 things react?

A

Group 1 element + oxygen

26
Q

As you go down group 7, does reactivity increase or decrease?

A

Decrease

27
Q

Fill the Gap: As you go down group 7, the halogens become ….. reactive.

A

Less

28
Q

In group 1, the elements react MORE or LESS vigorously as you go down the group?

A

More

29
Q

Name one way that a soluble salt from a solution.

A

Evaporation & Crystallisation

30
Q

Fill the gap: Metals have a ……… melting and boiling point.

A

High

31
Q

Transition metals are good ………

A

Catalysts

32
Q

Which group are Alkali metals in?

A

Group 1

33
Q

What was the new theory that J J Thompson created?

A

The plum pudding model.

34
Q

A you go down group 7, they have HIGHER or LOWER melting and boiling points?

A

Higher

35
Q

Fill in the blanks. J J Thompson measured …. & …. which showed atoms were smaller than Spheres.

A

Charge & Mass

36
Q

Name a difference between a Mixture and a Compound.

A

There is no chemical bond between pictures w\but there is in compounds.

37
Q

What ions do group1 have?

A

+1

38
Q

Fill the Gap: As you go down group1, there is an ………. in reactivity

A

Increase

39
Q

Define Malleable.

A

Can be bent or hammered into different shapes

40
Q

Why should you place a lid on top of the container?

A

To stop the solvent from evaporating.

41
Q

Fill the Gap: When group 1 elements react with water, they produce ……… gas

A

Hydrogen

42
Q

What are group 7 elements known as?

A

The halogens

43
Q

How did Dmitiri Mendeleev order elements in his version of the periodic table?

A

Order of atomic weight

44
Q

The halogens form 1- ions called…

A

Halides

45
Q

What colour poisonous gas is Chlorine?

A

Dense Green

46
Q

What colour poisonous gas is Bromine?

A

Red-brown

47
Q

Who conducted the Alpha particle scattering experiments?

A

Ernest Rutherford.

48
Q

What colour poisonous gas is Iodine?

A

Purple

49
Q

Group 1 metals react vigorously when heated in chlorine gas to form…

A

White metal chloride salts

50
Q

Group 0 elements are known as?

A

Noble Gases

51
Q

As you go down group 0, boiling points increase. True or False?

A

True

Chemistry (10 decks)

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