Families of elements and their properties

Answer Key - Grade 10 Science Worksheet - Building Confidence

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

1. 1.

   PubChem lists sodium's melting point as 370.95 K and potassium's as 336.53 K. How many kelvins lower is potassium's, Bo?

   34.42 K
2. 2.

   PubChem lists potassium's melting point as 336.53 K and cesium's as 301.59 K. How many kelvins lower is cesium's, Esme?

   34.94 K
4. 3.

   Using the table, what happens to melting points going down group 1, Jun?

   • They fall
   • They stay the same
   • They rise
5. 4.

   Using the table, which alkali metal has the lowest density, Kira?

   Use the picture in question 3.

   • Cesium
   • Rubidium
   • Lithium
6. 5.

   Using the table, which alkali metal melts at the lowest temperature, Luz?

   Use the picture in question 3.

   • Lithium
   • Cesium
   • Sodium
7. 6.

   What is the family name for group 1 metals, Milo?

   • Noble gases
   • Halogens
   • Alkali metals
8. 7.

   Magnesium and calcium belong to which family, Pia?

   • Alkali metals
   • Alkaline earth metals
   • Halogens
9. 8.

   How many valence electrons does each alkali metal have, Ren?

   • 1
   • 7
   • 2
10. 9.

    How many valence electrons does each halogen have, Tala?

    • 1
    • 7
    • 17
11. 10.

    Why are neon and argon in the same family, Zee?

    • Both have full outer shells
    • Both are metals
    • Both have 18 protons in the nucleus