Carbon

How many electrons does carbon have?

• 6

• 7

• 8

• 9

What are the radioactive isotope of carbon?

• C-11

• C-12

• C-13

• C-14

Carbon is arranged in what shape to make diamond?

• Triangle

• Hexagon

• Octahedron

• Tetrahedron

What is the chemical symbol of carbon?

• Ca

• C

• Cr

• Cu

• Cf

Carbon are arranged in what shape to make graphite?

• Triangle

• Square

• Pentagon

• Hexagon

• Heptagon

How many carbon atoms in citric acid (C₆H₈O₇)?

• 6

• 8

• 7

How many carbon atoms in propane (C₃H₈)?

• 8

• 7

• 6

• 3

• 2

Ca + H₂CO₃ = ?

• CaCO + O₂

• CO_{2 +} CaO

• CaCO₃ + H₂

• CaCO₂ + H₂O

• CaH₂O + CO₂