Core Knowledge For Topic Flashcards
What is meant by a mixture
Two Or more different particles not chemically joined
What is meant by a molecule
Particle made of more than one type of atom chemically joined. Elements are usually non metals
What is between the shells of electrons
Nothing
How do we calculate the mass number of an atom
Number of protons + number of neutrons
How do we calculate the atomic number of an atom
Number of protons
How does the number of protons compare to the number of electrons in an atom
They are the same
What does the group number tell you about an atom of an element in that group
The number of shells the atom has
What is a solution
When a solid dissolves into a liquid
What is a solute
The solid that dissolves in a liquid
What is a solvent
The liquid a solid turns into
What do we use to describe how easily a solute dissolves
Solubility
Substance made of two or more atoms chemically joined
Compound
A general name for any small piece of matter
Particle
List of all known elements with their symbols
Periodic table
How chemists show the combination of elements in a particle e.g CuSO4 or Na
Formula
Substance made of one type of atom.(hint: listed on the periodic table)
Element
The atomic no. And what else has the same number
Protons
Group goes horizontally but where does periods go
Vertically
What is a physical reaction
Particles are rearranged but no new substances are made eg dissolving and melting. It is normally reversible
What suggests a reaction
It could be a colour change or the temperature going down or up. In short a change
