10th grade How the periodic table was built and how it is arranged worksheet

How the periodic table was built and how it is arranged

Grade 10 Science Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Mendeleev predicted eka-aluminium's atomic mass as 68; gallium's is 69.723. What is the percent difference from the found value, to 0.01%, Ari?
2. 2.

   Mendeleev predicted eka-aluminium's density as 6 g/cm³; gallium's is 5.91 g/cm³. What is the percent difference from the found value, to 0.01%, Bo?
3. 3.

   Mendeleev predicted eka-silicon's density as 5.5 g/cm³; germanium's is 5.323 g/cm³. What is the percent difference from the found value, to 0.01%, Esme?

4. Read this first

   Use this

   ordered by atomic number

6. 4.

   Using the map, where are the transition metals, Jun?

   • The d block, groups 3–12
   • The s block, groups 1–2
   • The p block, groups 13–18
7. 5.

   Using the map, where is the f block, Kira?

   Use the picture in question 4.

   • In two rows below
   • At the far left
   • At the top right
8. 6.

   What sets the order of elements in today's table, Milo?

   • Atomic mass
   • Date of discovery
   • Atomic number
9. 7.

   Tellurium is heavier than iodine but comes before it. Why, Noah?

   • It has fewer protons
   • It was found first
   • It is lighter than iodine
10. 8.

    Why did Mendeleev's gaps matter, Ren?

    • They hid the mistakes in his data
    • They predicted unfound elements
    • They saved space
11. 9.

    What did finding gallium and germanium show, Tala?

    • The table could predict
    • Elements change over time
    • The table was wrong
12. 10.

    How did Mendeleev predict an unfound element's properties, Zee?

    • By guessing, with no data to go on
    • From its color
    • From its neighbors in the table