The Periodic Table (C. 5AB) Pre-Assessment Results Name: blake bilbrey Score


Which of the following discoveries led scientists to later believe that the Law of Triads was incomplete?



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Which of the following discoveries led scientists to later believe that the Law of Triads was incomplete?

    • A Scientists developed more accurate measurements of temperature to determine melting points.

    • B Scientists discovered additional elements on the Periodic Table beyond three per group.

    • C Scientists found out that there are not enough elements to group all of them in sets of three.

    • D Scientists developed better mathematical skills.

    • CORRECT

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THE PERIODIC TABLE WEBQUEST!!

Answer the questions on the following pages using the information on the websites provided.

ON THE SHOULDERS OF GIANTS

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Complete the following table using information from the website above.

Scientist Contribution to the development of the periodic table

Greek thinkers

Lavoisier

John Dalton

Doberiner

Dechancourtois

Cannizaro

Newlands


Meyer

Mendeleyev

Moseley

Seaborg


GETTING THE LAY OF THE LAND: PERIODICALLY ORGANIZED

Click here to learn more.

1. Why are the elements placed in specific places on the Periodic Table?

2. Periods are ________ that run from _______ to _______.

3. Elements in the same period have the same ________________________.

4. Every element in the first period has ________ shell for its _______. Every element in

the second period has __________ for its ___________. See the pattern?

5. Groups are _______________ that run from ______ to _________.

6. The elements of a group have the same number of ____________ in their ___________

shell.


7. Every element in group one has _________ electron in its outer shell. Every element in

group two has ___________ electrons in its outer shell.

8. Hydrogen is special because it can act like two groups, __________ and _________.

9. Hydrogen sometimes is ________________ an electron and sometimes it has an

_____________ electron.

10.Although helium has only __________ electrons in its outer shell, it is grouped with

elements that have ________________.

11. The green elements on this table are called ____________ elements. They each have

two electrons in their outer shell.

GETTIN'' TOGETHER WITH THE FAMILIES!!!!

Use this site to fill in the blanks below:

http.//chemicalelements.com/

12.




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