Atom Antics
Which subatomic particle has a negative charge?
Electron
Which type of bonding involves the transfer of electrons?
Ionic bonding
Is NaCl ionic or covalent?
Ionic
Which type of substance is usually a good conductor of electricity?
Metallic
True or False: All compounds containing carbon are organic.
False
How many electrons can the first electron shell hold?
2
Complete the memory trick: Ionic = TRANSFER, Covalent = SHARE, Metallic = _____.
SEA
What is the name of CO₂?
Carbon dioxide
Why don't solid ionic substances conduct electricity?
Their ions cannot move
What type of bond must a compound contain to be classified as organic?
A carbon–hydrogen (C–H) bond
Sodium has atomic number 11 and mass number 23. How many neutrons does it have?
12
A metal reacts with a non-metal. What type of bond would you predict?
Ionic
What is the formula for magnesium chloride?
MgCl₂
Why can metals conduct electricity?
Their delocalised electrons can move through the metal
CH₄ is methane. Is it organic or inorganic? Explain how you know.
Organic — it contains C–H bonds.
An atom has the electron configuration 2,8,7. How many valence electrons does it have and what does it need to do to achieve a full outer shell?
7; gain 1 electron
Explain why Na⁺ and Cl⁻ are attracted to each other.
Electrostatic attraction between opposite charges
Name N₂O₄.
Dinitrogen tetroxide
Polyethylene contains covalent bonds. Why is it useful for covering electrical wires?
Covalent substances do not conduct electricity, so it acts as an insulator
CO₂ contains carbon. Why is it still classified as inorganic?
It does not contain any C–H bonds.
An atom has 17 protons, 18 electrons and 18 neutrons. What is its charge?
−1
Magnesium loses 2 electrons and oxygen gains 2 electrons. What ions form, and why do they bond?
Mg²⁺ and O²⁻; opposite charges attract through electrostatic attraction
Aluminium forms Al³⁺ and oxygen forms O²⁻. What is the formula of aluminium oxide?
Al₂O₃
A mystery substance has a high melting point, does not conduct as a solid, but does conduct when dissolved in water. What type of substance is it, and why?
Ionic; ions are fixed in the solid but can move when dissolved
Mystery round! Classify all four: H₂O, C₂H₅OH, CaCO₃ and C₆H₁₂O₆ as organic or inorganic.
H₂O = inorganic; C₂H₅OH = organic; CaCO₃ = inorganic; C₆H₁₂O₆ = organic.