Chemicals Flashcards
Draw daltons, thompsons and Rutherfords atom diagrams
See review
Describe an electron
Subatomic particle
- little mass
- orbits nucleus
- has negative charge
Describe a proton
- positive charge
- in nucleus of atom
- 1 amu
Describe a neutron
- no charge
In nucleus
1 Amu
Describe atomic mass
The mass of the subatomic particles in a molecule or particle.
The mass of protons and neutrons
Atomic number
The number of protons or electrons in a atom of a element
Valence electrons
Amount of electrons the the outer shell of an atom, it determines the bonding power of a atom
How can u tell if a chemical reaction has taken place
- Heat is produced or absorbed
- The starting material is used up
- A new colour appears
- A starting colour appears
- A material with different properties
forms - Gas bubbles form in a liquid
- Solid partial grains are precipitate form in a liquid
Describe a alkali metal
Soft reactive
1 electron in outer shell
Describe a alkaline earth metal
Reactive but not as much as alkalis bond readily
Describe a halogen
Very reactive, strong smell
Cleaning products
Noble gases
Stable, not very reactive
Output le
Describe a metal
Boring shiny conduct electricity
Group
Collums that show the number of Valence electrons are in a family
Periods
Rows that show the number of shells that electrons orbit around
Element
A pure substance consisting of a song type of atom
Atom
Made up of subatomic particles is the smallest component of a substance
Compound
2 or more atoms combined chemically to form a pure substance
Molecule
A group of atoms
1 particle of a compound
Ionic bonds
When a atom loses an electron and gives it to another atom
Ex NaCl
Covalent bond
When all molecules share the same number of electrons electrons
Ex h20
What’s the difference between a physical change and a chemical change
Physical- no new substance is formed, new properties may appear but same particles are there
Chemical- new substance is formed
Original particles have changed
Difficult or impossible to reverse
Procedure of using a Bunsen burner
- Find fire extinguisher
- Tie back hair, roll up sleeves
- Place Bunsen burner on flat, heat resistant surface
- Air hike is closed or partially closed
- Check rubber tubing for cracks and secure it to gas valve
- Turn on gas valve
- Create spark with flint
- Adjust flame with air hole
- Place ring stand above flame
