General
Is Sodium (Na) a metal or non metal?
Metal
A metallic bond is between what two types of elements?
Two metals
Do non-metals lose or gain electrons?
Gain
A covalent bond is between which two types of elements?
Non-metals
What noble gas is commonly used in balloons to make them float?
Helium
What is the chemical formula for water?
H2O
What is an alloy?
A mixture of 2 or more metals
Do metals lose or gain electrons?
lose
Does covalent bonding involve the transfer or sharing of electrons?
Sharing
What two letters are not found on the periodic table? (hint - from yesterday!)
What are valence electrons?
Electrons in the outer shell of an atom
What are the "free-moving" electrons in a metallic bond called?
Delocalised electrons
An ionic bond is between which two types of elements?
A metal and non-metal
How many valence electrons does Argon have?
8
What gas creates the fizz in soda?
CO2
Which group on the periodic table do noble gases belong to?
Group 18
Why are alloys preferred over pure metals?
-increased strength, hardness, corrosion resistance
What charges does a cation and anion have?
Cation (+) and Anion (-)
When is the octet rule satisfied?
When atoms have 8 valence electrons (8 electrons in outer shell)
What is the most abundant gas in Earth's atmosphere?
Nitrogen (N₂)