Flashcards in Chemistry Deck (30)
Properties of Metaloids
- Characteristics of both metals and non-metals
- Good semi-conductor
Properties of Non-metals
- Not good conductors of heat and electricity
- High electronegativity
What is the same number as the atomic number?
The number of protons and electrons
Name the greenhouse gases
Carbon dioxide, methane, water vapour and nitrous oxide
Greenhouse gases keep heat closer to the earth for longer than it normally would, by bouncing the heat off in every direction before allowing the heat to escape, making earth say warm.
Warming of the Earth due to the human increase of emissions of carbon dioxide, methane and nitrous oxide.
negatively charged particles
positively charged particles
Covalent is between two non-metals eg O2, H2
Ionic is between metal and non-metal
Properties of Metals
Good conductors of heat and electricity
Number of protons and neutrons in the nucleus
Hydrochloric acid + Sodium =
Sodium chloride and hydrogen gas
Hydrochloric acid + Calcium =
Calcium chloride and hydrogen gas
Types of Reactions
Single Displacement Reactions
Double Displacement Reactions
Characteristics of Covalent Bonds
Physical properties that include lower melting points and electrical conductivity
Characteristics of Ionic Bonds
Soluble in water.
They are compounds formed from metals and non-metals.
In a solid state they do not conduct electricity
An alloy is a metal combined with other substances, resulting in strength, hardness, durability, ductility, tensile strength and toughness.
Examples and Characteristics of Alloys
Mild Steel, Hard Steel, Cast Iron, Stainless steel. Stong and good as tools.
Life Cycle of a Star
Stellar Nebula>Star>Red Giant>Planetary Nebula>White Dwarf OR
Stellar Nebula>Massive Star>Red Super-giant>Supernova> Black Hole or Neutron Star
A carbon sink is a natural or artificial reservoir that accumulates and stores some carbon-containing chemical compound for an indefinite period
Carbon dioxide goes into living tissue by photosynthesis and returns to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.