Reading the periodic table

Grade 8 Science Worksheet

Circle the best answer.

1. 1.

   An atom has 12 protons. Using the two tiles, which element is it, Ari?

   • Magnesium, with atomic number 12
   • Carbon, with mass about 12.0
   • Either one; the numbers match
   • Neither one
2. 2.

   An atom has 4 protons. Using the two tiles, which element is it, Esme?

   • Helium, with mass about 4.0
   • Either one; the numbers match
   • Neither one
   • Beryllium, with atomic number 4
3. 3.

   Using the strip, which element should behave most like sodium, Jun?

   • Potassium, in the same group
   • Chlorine, in period 3 too
   • Beryllium
   • Magnesium, next to it in period 3
4. 4.

   Using the strip, which element should behave most like fluorine, Kira?

   • Oxygen, in period 2 too
   • Neon, next to it in period 2
   • Chlorine, in the same group
   • Sulfur
5. 5.

   Using the strip, which element should behave most like magnesium, Luz?

   • Sodium, in period 3 too
   • Potassium
   • Aluminum, next to it in period 3
   • Calcium, in the same group

6. Read this first

   Use this

   Outline of the periodic table (IUPAC) with a thick staircase line from boron down to tellurium. Metals are shaded on the left and in the middle; nonmetals are unshaded on the right; the elements along the staircase (B, Si, Ge, As, Sb, Te) are dotted as metalloids. Hydrogen, at the top left, is unshaded.

7. 6.

   Germanium sits on the staircase line. How should Milo classify it?

   • Metalloid
   • A gas
   • Metal, since metals sit on the right
   • Nonmetal, since it is not shiny
8. 7.

   Copper sits in the middle of the table. How should Noah classify it?

   • Noble gas
   • Metal
   • Nonmetal, since metals are on the right
   • Metalloid
9. 8.

   Bromine sits on the right, past the staircase. How should Pia classify it?

   • Metal, since it is a liquid
   • Nonmetal
   • Metal, since it is on the right
   • Metalloid
11. 9.

    Using the strip, which group is oxygen in, Tala?

    • Group 16
    • Group 2, its row
    • Group 8, its atomic number
    • Group 1
12. 10.

    Using the strip, where is iron, Zee?

    Use the picture in question 9.

    • Period 26, group 4
    • Period 8, group 4
    • Period 4, group 26
    • Period 4, group 8