Science 7 · Unit 2: Materials and their structure · Cambridge Lower Secondary Science Stage 7

Questions

1. 1. What is the symbol for sodium?

   • Na
   • S
   • Sd
   • So
   Check

2. 2. What is the symbol for magnesium?

   • Mn
   • M
   • Ma
   • Mg
   Check

3. 3. What is the symbol for boron?

   • B
   • Br
   • Bo
   • Be
   Check

4. 4. What is the symbol for calcium?

   • Cl
   • Ca
   • C
   • Cm
   Check

5. 5. What is the symbol for potassium?

   • Pt
   • K
   • P
   • Po
   Check

6. 6. Which element has the symbol Ar?

   • gold
   • aluminium
   • arsenic
   • argon
   Check

7. 7. Which element has the symbol P?

   • platinum
   • lead
   • potassium
   • phosphorus
   Check

8. 8. Which element has the symbol C?

   • calcium
   • carbon
   • chlorine
   • copper
   Check

9. 9. Which element has the symbol Cl?

   • copper
   • calcium
   • chlorine
   • carbon
   Check

10. 10. Which element has the symbol Li?

    • lanthanum
    • lithium
    • lime
    • lead
    Check

11. 11. Which symbol is written correctly?

    • Mg
    • mg
    • mG
    • MG
    Check

12. 12. Why is the symbol for sodium Na and not S?

    • It comes from sodium's old Latin name, natrium.
    • Scientists chose letters at random.
    • Na is short for 'not a gas'.
    • S is the symbol for silver.
    Check

13. 13. In the Periodic Table, what are the rows that go across called?

    • periods
    • groups
    • symbols
    • atoms
    Check

14. 14. In the Periodic Table, which elements are on the left-hand side and in the middle?

    • the metals
    • the non-metals
    • the gases
    • the liquids
    Check

15. 15. Use the Periodic Table. Which element is in the same group as calcium?

    • aluminium
    • magnesium
    • sodium
    • potassium
    Check

16. 16. Use the Periodic Table. Which elements are in the same period as oxygen?

    • sulfur and selenium
    • sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine and argon
    • lithium, beryllium, boron, carbon, nitrogen, fluorine and neon
    • hydrogen and helium
    Check

17. 17. Which group contains both a metal and a non-metal?

    • the group with fluorine and chlorine
    • the group with helium, neon and argon
    • the group with boron and aluminium
    • the group with lithium, sodium and potassium
    Check

18. 18. Use the Periodic Table. Which of these elements is a gas in the same period as carbon?

    • boron
    • argon
    • neon
    • lithium
    Check

19. 19. What is an atom?

    • a drop of liquid seen under a microscope
    • a substance made of two or more elements joined together
    • a kind of cell found in living things
    • a very tiny piece of matter that everything is made of
    Check

20. 20. What is an element?

    • a substance that is found only in laboratories
    • a substance made of only one kind of atom
    • a substance made of many kinds of atom mixed together
    • any substance that is a solid
    Check