Answer:
The existence of isotopes contradicts part of Dalton's original atomic theory because he said all atoms of a given element are identical have the same mass size and chemical properties.
Explanation:
Answer:
Neither 'saben' nor 'conocen' is a correct choice.
Explanation:
Tú <em><u>conoces</u></em> el dueño del mercado.
Use 'conocer' when referring to knowing a person.
1. lo
2. necessito
3. la
4. un sombrero
5. no te entiendo
hope this helps!
This looks pretty correct ....
good
