Chemistry - End Of Year Flashcards
What is filtration for?
to separate substances that are insoluble in a particular solvent from those that are soluble in the solvent.
The atomic structure is…
electrons surrounding a nucleus that contains protons and neutrons.
Which is negatively charged?
Electron
Protons and electrons are … charged
Electrically
Which is positively charged?
Proton
Which is neutral?
Neutron
The number of protons in an atom is called …
Atomic number
What is an isotope?
Different form of the same element. It has the same number of protons but a different number of neutrons.
What is a compound?
A substance made up of two or more elements, chemically bonded
What is an atom?
Smallest component of an element
What is an element?
A substance consisting of atoms which have the same number of protons etc.
What is a mixture?
A substance made up of two or more elements, not chemically bonded
Equation of relative atomic mass (Ar)
Sum of (isotope abundance X isotope mass number) / sum of abundances of all isotopes
The top number of an element is the..
Mass number
The bottom number of an element is the..
Atomic number
The letters on the element are…
Chemical symbols
The mass number shows…?
The total number of neutrons and protons
The atomic number shows…?
The number of electrons which is also the name number of protons.
