Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta

AQA Triple Science: Physics 6 marker watch

Announcements
    • Thread Starter
    Offline

    8
    ReputationRep:
    Hello, can someone mark my 6 marker for physics:

    Scientists sometimes replace one scientific model with a different model.

    For example in the early 20th Century the plum pudding model of the atom was
    replaced by the nuclear model of the atom.

    Explain what led to the plum pudding model of the atom being replaced by the
    nuclear model of the atom.
    [6 marks]

    My ANSWER:
    In the early 20th century scientists in Ernest Rutherford's lab conducted the golden foil experiment. This experiment consisted of firing alpha particles at a thin sheet of gold. Most of the particles fired passed straight through, without changing course. This indicated that the majority of the atom is empty space. Some particles though, bounced back or changed course, indicating that the atom had a positive charge in the middle and that the majority of the atom's mass was concentrated in the center. This contradicts the plum pudding model of the atom as in the plum pudding model, the mass and charges are spread throughout the atom. This lead to the replacement of the plum pudding model with the nuclear model of the atom
    Offline

    6
    ReputationRep:
    Hey, I have the same question and mark scheme.

    Here's the model answer:
    vote
    The Gold Foil experiment that was carried out by Rutherford, Geiger and Mardsen showed that there was something in the atoms of gold that was positively charged and heavy. This was called the nucleus and it was known to have a + charge. this disproved Thomson's model that the positive in the atom was like jelly. The gold foil experiment also showed that most of the atom was empty space - which again disproved Thomson's model because Thomson's model had no empty space. Therefore Rutherford came up with a new model, where the nucleus was in the centre (they didnt know about neutrons at this time) and the electrons were in the space surrounding it. Rutherford's experiment disproved Thomson's model which is why it was replaced.

    I'd say 5 marks?
    Posted on the TSR App. Download from Apple or Google Play
    • Thread Starter
    Offline

    8
    ReputationRep:
    Hmm mine seems more technical than the model answer, anyone else?
    Offline

    6
    ReputationRep:
    Re-reading it I agree actually, the model answer does seem as scientific or use as sophisticated vocab as yours does 😞
    Posted on the TSR App. Download from Apple or Google Play
 
 
 
Poll
Do I go to The Streets tomorrow night?
Useful resources

Study tools

Rosette

Essay expert

Learn to write like a pro with our ultimate essay guide.

Thinking about uni already?

Thinking about uni already?

See where you can apply with our uni match tool

Student chat

Ask a question

Chat to other GCSE students and get your study questions answered.

Creating

Make study resources

Create all the resources you need to get the grades.

Planner

Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

Papers

Find past papers

100s of GCSE past papers for all your subjects at your fingertips.

Help out other students

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.