chem review test Flashcards
What type of bond has a metal and non metal?
ionic
What type of compound has non metal and non metal?
Covalent
What do ionic compounds do with electrons?
They lose and gain them.
What do covalent bonds do with electrons?
They share them.
What type of electric charge do protons have?
They have a positive charge.
What type of electric charge do neutrons have?
They have a neutral charge.
What type of charge do electrons have?
They have a negative charge.
Where do you find neutrons?
In the nucleus.
Where do you find protons?
In the nucleus.
Where do you find electrons?
in the outer shells.
What is homogenous mixture?
A homogenous mixture is that mixture in which the components mix with each other and its composition is uniform throughout the solution.
What is a heterogenous mixture
A heterogenous mixture is that mixture in which the composition is not uniform throughout and different components are observed.
What are 6 signs of chemical reactions?
Change in colour, change in smell, bubbles produced, sound produced, template change, light produced
Why do metals react with non metals?
The metal wants to lose electrons. non metal wants to gain electrons. Reason: they want complete outer shells.
Why is an atom that’s further down the table more reactive?
Because it’s further away from the nucleus, therefore it has more shells, and is more weakly attracted to the nucleus. so they’re easier to lose
What does exothermic mean? and what’s an example?
Gives off heat, campfire.
What does endothermic mean? and what’s an example?
Absorbs heat, chill packs.
What are three uses for the flame test for metals?
- Identifying elements (which one is burning)
- To find undiscovered metals(identifying unknown metals)
-for making fireworks
to identify metals burning in stars
Name of product ionic reactions
Ionic compounds
name of product of covalent reactions
Molecule
