Question

by taking this checkpoint, you will check your understanding of the concepts youve been working on in this lesson. you take the checkpoint multiple times. only your highest score will be recorded in the gradebook. if you scored poorly th time, go back and review the lesson activities you struggled with before taking the checkpoint again. ask your teacher for assistance if you need extra help.
good luck!
note: to answer some of the questions, it may help to reference a periodic table.
which statement accurately describes how j.j. thomson’s model of the atom differed from john dalton’s model of the atom?
thomson’s model depicted atoms as tiny spheres with positive charge, while dalton’s model showed atoms as spheres that did not have charge.
thomson’s model depicted atoms as tiny spheres that contained no charge, while dalton’s model showed spheres that had positive charges.
thomson’s model depicted atoms as tiny spheres without charge, while dalton’s model showed atoms having positive and negative charge.
thomson’s model depicted atoms as tiny positive spheres with negative charges while dalton’s model showed atoms as spheres with no charge.
question 4
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question 10

Explanation:

1. Recall Dalton's atomic model: Dalton proposed atoms as indivisible, solid spheres with no charge (neutral).
2. Recall Thomson's atomic model (plum - pudding model): Thomson proposed atoms as a positively charged sphere (the "pudding") with negatively charged electrons (the "plums") embedded in it.
3. Analyze each option:

• Option 1: Thomson's model had both positive and negative charges, not just positive. Dalton's model had no charge. So this is incorrect.
• Option 2: Thomson's model had charge (positive sphere with negative electrons), Dalton's had no charge. So this is incorrect.
• Option 3: Thomson's model had charge, Dalton's had no charge. So this is incorrect.
• Option 4: Thomson's model: positive sphere with negative charges (electrons). Dalton's model: spheres with no charge. This matches the correct descriptions of their models.

Answer:

The correct option is: Thomson’s model depicted atoms as tiny positive spheres with negative charges while Dalton’s model showed atoms as spheres with no charge.