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Chem lcb year 10 winter Flashcards | StudBud
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Chem lcb year 10 winter
Chem lcb year 10 winter
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1
How many groups in the periodic table?
6
12
10
8
2
What is number 3 pointing towards?
Outer shell
Electron shell
Mass number
Nucleus
3
How many elements were known in the early 1800s?
50
Around 60
200
Around 90
4
What was Alexander Beguyer de Chancourtois the first to do?
Realise water is a compound of 1 hydrogen and 2 oxygen
Discover magnesium
Arrange elements in a table by alphabetical order
Arrange elements in a table in order of atomic weight
5
Where is gold (a transition metal) used in everyday life?
Standard desktop / laptop computers
Paper files
50 cents worth of gold is contained in a cellphone
Cupboards
6
What are some physical properties of the transition metals?
High boiling point
High melting point
Conducts electricity and heat
Flexible
7
What does an atom consist of?
Protons
central nucleus containing ps and ns surrounded by electrons in a pattern
8
Which ways had chemists previously grouped the elements that Mendeleev put together to make his table?
By their properties (e.g. reactivity with H20)
In octaves
By alphabetical order
By their atomic weight
9
What is an atom?
A substance that contains only one type of atom
The smallest particle of an element that can exist on its own
Two or more elements chemically combined
10
Why, in terms of electronic structure, is group 8 unreactive?
Full outer shell of electrons, so find it hard to lose or gain electrons
They are noble gases
They have an empty outer shell of electrons, so find it hard to lose them
11
In group 7, what decreases as you go down the group?
Reactivity
Flexibility
Aesthetic quality
Conductivity
12
What is copper (a transition metal) used for?
Electrical wiring
Plates
Pipes
Printed circuit boards
13
What is number 2 pointing towards?
Outer shell
Nucleus
Mass number
Electron shell
14
What are the unusual properties of group 1 metals?
They’re soft
They burn with a squeak pop
They float on water
They react strongly with water
15
What does the number of protons equal?
The number of neutrons
The number of electrons
The nucleus
16
What is the third step of carrying out a flame test to tell which metal is present in a compound ?
So that some sticks to it
Use the results to fill out a table
Dip the damp splint into a small amount of the metal you are testing
Place the splint on Bunsen burner flame and observe flame colour
17
What did Dimitri Mendeleev do?
The first to say all elements weighed the same
Married 2 women named Anna
Began classifying elements on their properties and weights
Created periodic table with gaps for undiscovered elements, published 1869
18
What would happen to the overall charge of an atom that loses an electron?
It would become positive because the PROtons would overrule the electrons
It would become negative
It would become negative because the protons would overrule the electrons
It would become positive
19
Transition metals show trends in group properties
True
False
20
What did Antoine Lavoisier say first?
An element cannot be broken down by chemical methods
Compounds are 2 elements
Elements are substances that are easily dissolved
Elements are made of one atom
21
What idea did John Newlands have?
The law of octaves, assuming all elements were discovered
Every 8th number on the table shared atomic properties
The periodic table should be called so because of the periods
Elements could be arranged in 8 groups according to atomic weight
22
What atom is this?
Hydrogen
Beryllium
Fluorine
Lithium
23
What atom is this!
Nitrogen
Oxygen
Fluorine
Beryllium
24
What groups are non metals?
345678
1234
12
78
25
What does the mass number tell us?
The total number of protons plus neutrons in the atom
How many protons are in the atom
The total number of protons minus neutrons in the atom
26
How did Mendeleev begin making his table?
He did it all in a small notebook in his office
While baking a multilayered cake
With a pack of cards with elements atomic weights written on
With a book he wrote
27
What is a compound that has 2 atoms of hydrogen and 1 atom of oxygen joined together?
Mortar
Concrete
Water
Air
28
What atom is this?
Lithium
Sodium
Beryllium
Hydrogen
29
What was wrong with John Newlands table?
He assumed all elements had been discovered
He should have made more groups
He filled in his octaves despite some elements not being similar
He put two elements in the same place to make everything fit
30
What idea did Henry Moseley have?
-Of behaviour in different elements
It was the atomic number not weight that caused the repeat patterns
It was the atomic weight not number that caused the repeat patterns
31
How are electrons arranged?
In shells in a pattern. Shell 1- holds 2. Shell 2/3- can hold up to 8
In shells in a pattern. Shell 1- holds 2. Shell 2- holds 8. Shell 3-holds 6
In shells in a pattern. Shell 1- holds 8. Shell 2/3- holds 2
32
When was dimitri mendeleev alive?
1834-1907
1837-1904
33
What is a compound
Two or more elements chemically combined
The smallest particle of 2 electrons
34
What 2 elements do you need to know have a fourth shell?
Potassium and sodium
Calcium and carbon
Potassium and calcium
Lithium and sodium
35
What happened in Mendeleev’s dream?
He saw elements coming together to form compounds and mixtures
He saw the 63 discovered elements arranged in a table
He saw sodium
36
What does R.O.S stand for in risk assessment?
Risks, omnipotence, steps
Risk, outcome, source
Regina,Oscar,Siobhan
Risk, outcome, steps to minimise
37
What is the second step of carrying out a flame test to see which metal is in a compound ?
Use wooden splint that has soaked in water overnight
Place splint into Bunsen burner flame and observe flame colour
Dip damp splint into small amount of metal we are testing
38
What is number 4 pointing towards?
Nucleus
Mass number
Outer shell
Electron shell
39
What is the first step to carry out a flame test?
Use a wooden splint soaked in water so chemical will burn and not wood
Place splint into Bunsen burner flame and observe the colour of flame
Dip damp splint into metal you are testing
Record results of the experiment in a table
40
Group 2 metals are more reactive than group 1
True
False
41
When was Glenn Seaborg awarded his Nobel peace prize?
1951
1952
1987
1999
42
What is the atomic number of sodium?
12
23
11
34
43
Elements in the same group share the same amount of electrons in their outer shell
False
True
44
What does the atomic number tell us?
How many protons are in the atom
How many neutrons are in the atom
45
Which group of elements is very dangerous yet useful?
Group 8
Group 3-8
Group 7
Group 1 and 2
46
What is number 1 pointing to?
Nucleus
Mass number
Outer shell
Electron shell
47
What is an element?
A substance that consists of one or more atoms
Two or more elements chemically combined
A substance made of 2 or more atoms
A substance that consists of only one type of atom
48
What atom is this?
Calcium
Potassium
Hydrogen
Silicon
49
What are some uses of group 7 elements?
Bromine is used in flame retardant
Iodine is used to clean sap off of trees
Fluorine is used in toothpaste
Chlorine helps sanitise swimming pools
50
What element was named after Glenn Seaborg?
Element 102, Sg
Seaborgium
Americium
Element 106, Sg
51
What are the observations when sodium reacts with water?
Same as lithium but stronger
Stays still
Fizzes slowly
Metal disappears
52
What extraordinary thing did Glenn Seaborg do?
Realised 102 of the discovered elements were not elements, just compounds
Created the church of Scientology
Discovered an element
Discovered plutonium and all other elements up to 102
53
What atom is this!
Lithium
Helium
Hydrogen 2
54
What are the observations when lithium reacts with water?
It does not fizz
It moves around the surface of the water
It sinks
It floats and fizzes
55
What is a molecule?
A droplet of water
An element that is made of atoms joined together
O2
56
What are the observations when potassium reacts with water
Does not fizz
Sinks
Stays still
The same as sodium but even stronger
57
What is a group in the periodic table?
A row that goes from left to right on the periodic table
A vertical column on the periodic table
58
What did John Dalton discover?
Atoms cannot be broken
2 oxygen + 1 hydrogen = water (compound)
He was British
Atoms join together to make everything
59
What did Mendeleev do with the cards?
Played poker
Layed them out to see where there was a pattern
60
Which are the magnetic transition metals?
Banana
Neptunium germanium
Iron, cobalt, and nickel
Iron copper and silver
61
When is iron (a transition metal) used in everyday life?
Cutlery
Pillows and cushions
Cooking stoves
Dishwashers
62
What is the mass number of sodium?
11
12
34
23
63
Why is a risk assessment needed for a practical in chemistry?
To make sure we amplify risks
Trick question, it’s not needed
To try and prevent injury and reduce risks.
64
Where do the transition metals lie?
Between group 2 and 3 on the periodic table
In group 2
Between group 1 and 2 on the periodic table
Between group 3 and 5 on the periodic table
