Elements and compounds 9th-grade

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

Which is the correct formula for:
one carbon (C)
two oxygen (O)

• CO₂
• CO
• C₂O
• 2CO

How many different elements are in H₂O?

• 1
• 2
• 3
• 4

The number at the top of each square on the periodic table is the ...

• atomic number
• atomic mass
• Chemical Symbol
• Element Name

What is Fe₂O₃
(rust) made up of?

• 1 flourine, 2 einsteinium,
  3 oxygen
• 2 fluorine, 3 oxygen
• 2 iron, 3 oxygen
• 2 iron, 3 osmium

If you have a material that can conduct electricity well it is probably a...

• Metalloid
• Matter
• Non-metal
• Metal

How would this element be classified?

• Metal
• Nonmetal
• Metalloid
• Metamorphic

What element has the symbol Ca?

• Californium

• Calcium

• Carbon

• Copper

What element has the atomic number 23?

• Na (Sodium)

• Th (Throrium)

• Sc (Scandium)

• V (Vanadium)