Science, Chem - Material properties Flashcards
1
Q
Atom
A
- everything is made up of atoms
- hundreds of different types of atoms
- smallest part of an element
- cannot be divisible
2
Q
Elements
A
- something made of the same atom
- cannot be broken down into simpler substance
- represented by symbols
- have same properties as their atoms
3
Q
Molecules
A
- atoms joining together to form larger particles
4
Q
Compounds
A
- made of atoms of elements joined to atoms of other elements
- mixed/separated chemically
- can be broken down into simpler elements, using chemical reactions
- represented by the formula
- having different properties as their atoms
5
Q
Mixture
A
mixed/separated physically
6
Q
mono = ___
di = ___
tri = ___
tetra = ___
A
mono = one
di = two
tri = three
tetra = four
7
Q
Compound, non-metal + metal
A
- metal
- nonmetal
- change ending of element to “-ide”
e.g. zinc + oxygen → zinc oxide
8
Q
Compound, non-metal + metal + oxygen
A
- metal
- non-metal
- change ending of element to “-ate”
e.g. copper + sulphur + oxygen → copper
sulfate
9
Q
Compound, ONLY non-metals
A
- depends on the amount of atoms
e.g. sulphur (1) + oxygen (2) → suphur
dioxide
10
Q
Metal Oxide
A
- bases (pH more than 7)
- neutralize acid
- dissolve in water to form alkaline solutions
e.g. zinc oxide, calcium oxide, sodium oxide
11
Q
Non - Metal Oxide
A
- most are acidic (pH less than 7)
- dissolve in water to form acidic solution
e.g. carbon dioxide, sulphur dioxide
12
Q
Hydroxide
A
- compound of oxygen, hydrogen & another element
- some metal hydroxide dissolve in water to form alkaline solutions
13
Q
Carbonates
A
compound of carbon, oxygen & another element
14
Q
Sulfate
A
compound of sulfur, oxygen & another element
15
Q
Chemical Reactions (1)
A
- happen everywhere
- to develop medicines, fuels & materials
- create new substances = will end up different
- are not reversible = can’t get back the substances you started with.
