Matter Flashcards
What is the trend in group 1?
As you go down the group the reactivity get higher, the melting point gets lower as you go down.
What is the trend in group 7?
The reactivity gets higher as you go down, and the melting point gets lower as you go down.
What is an atom?
The smallest particle of a chemical element.
What is a element?
A substance that only contains 1 type of atom, and cannot be broken down into other substances.
What is a compound?
Pure substances made up of atoms of two or more elements, chemically bonded together.
What is a mixture?
Two or more elements not chemically bonded together, they can be easily separated.
What are the first 20 elements in the period is table.
Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminium, silicon, phosphorus, sulphur, chlorine, argon, potassium, magnesium.
