Compounds Flashcards
Atoms join together to make what?
Compounds.
When different atoms react, what happens?
Atoms form chemical bonds with other atoms form compounds.
Usually hard to separate the 2 original elements out again.
What does making bonds involve?
Atoms giving away, taking or sharing electrons
What is only involved?
Electrons.
Nothing to do with the nuclei of the atoms.
A compound formed from a non-metal and a metal consists of what?
Ions.
What happens to the metal atoms?
They lose electrons to form positive ions.
What happens to the non-metal atoms?
They gain electrons for form negative ions.
The opposite charges of the ions means what?
They are strongly attracted to each other.
What is ionic bonding?
It is a type of chemical bond that generates two oppositely charged ions.
Give an example of ionic bonding?
NaCl.
A sodium atom gives an electron to a chlorine atom.
A compound formed from non-metals consists of what?
Molecules.
What is covalent bonding?
When each atom shares an electron with another atom.
Each atom has to make enough covalent bonds to fill up its outer shell.
Give an example of a covalent bond.
HCl.
A hydrogen atom bond with a chlorine atom by sharing an electron with it.
How are original elements different from a compound?
They both have totally different properties.
Give an example of original elements are different to compounds?
Iron - magnetic metal.
Reacts with
Sulfur - yellow powder
The compound formed is a dull grey solid lump and does’t behave like either iron or sulfur.
