Yr Chemistry Revision Flashcards
What is the smallest building block of matter?
The atom.
What are elements?
Substances made up of only one kind of atom.
What are compounds?
Substances composed of two or more kinds of atoms chemically joined together.
What are the main groups of elements in the periodic table?
Metals and non-metals.
What is the difference between reactants and products in a chemical reaction?
Reactants are substances used up in a reaction, while products are substances formed.
What is a proton?
A positively charged sub-atomic particle found in the nucleus of an atom.
What is a neutron?
A sub-atomic particle with no charge found in the nucleus of an atom.
What is an electron?
A negatively charged particle that orbits the nucleus of an atom.
What is malleability?
The ability of a metal to be hammered or rolled into sheets.
What is ductility?
The ability of a metal to be drawn into wires.
Describe the general appearance of metals.
Metals are usually shiny, solid at room temperature, and good conductors of heat and electricity.
Describe the general appearance of non-metals.
Non-metals can be solid, liquid, or gas, usually not shiny, and poor conductors of heat and electricity.
Describe metals’ typical physical state at room temperature.
Metals are usually solid at room temperature.
How do metals conduct heat and electricity compared to non-metals?
Metals conduct heat and electricity well, while non-metals do not.
What is the atomic number?
The number of protons in the nucleus of an atom.
