Karteikarten
Science exam 2
Karten in diesem Stapel (25)
- 1Define matterMatter-is anything that has a mass or takes up space.
- 2State the Particle Theory- All matter is made up of particles
-have spaces
-always moving
-attract - 3Explain Chemical properties and examplesAbility of a substance to change into a new substance. i.e., combustible, forms precipitate, emits heat or light, reacts to acid/water.
- 4Explain Physical propertiesA characteristic of a substance that can be observed/measured i.e., melting point, colour/lustre, conductivity, viscous, malleable, ductile
- 5There are 4 gas tests: hydrogen, oxygen, carbon dioxide, water vapour. Describe each one.Hydrogen-detected using a flaming splint which exploded.
Oxygen-detected using a glowing splint which flames
Carbon dioxide- detected using limewater which went cloudy.
Water vapour-detected using cobalt chloride paper which turned pink. - 6Define Electrolysisdecompose a chemical compound by passing electricity through it.
- 7what is a compound?a pure substance made up of two or more elements that are chemically combined
- 8What do chemical formula's do?Identify which element and how many there are in the compound.
- 9JJ Thomson was known for the___ method. What was his experiment?Known for the raison bun method.
Experimented with electric currents in glass tubes called cathode ray tubes. This caused atoms to produce streams of negatively charged particles. - 10Ernest rutherford known for___ method. What was his experiment?Known for electron cloud model. He fired positively charged particles at a thin gold foil. Most went through although some deflected.
- 11What did chadwick discover?He discovered that the nucleus contains both neutral and positive particles
- 12What did Bohr discover?He discovered a solar system type model where electrons orbit around the nucleas
- 13How many electrons can be in the first,second, and third valence shell.2,8,8
- 14Atomic Number?Atomic Number: represents the number of protons present in an atom
- 15Atomic Mass?Atomic Mass: the mass of 1 atom of an element; measured in atomic mass units (amu)
- 16How are the metals,metalloids,non-metals arranged on the periodic tableMetals ended up on the left side, non-metals on the right side and metalloids in the middle
- 17What's an Ion? metals tend to ___ electrons and non-metals tend to ___ electrons.Ions form when atoms gain or lose electrons and become negative or positive.Metals tend to lose electrons and non-metals gain electrons
- 18What are the 4 families in the peri0odic table?Alkali Metals,Alkaline Earth Metals , Halogens,Nobel Gases
- 19Describe the location of the Alkaline metals, Alkaline earth metals, Halogens, Noble gasesAlkaline metals- group1
Alkaline earth metals- group 2
Halogens-17
Noble gases-18 - 20What is PEN?Protons=atomic number
Electrons=# protons
Neutrons= atomic mass - atomic number - 21PHYSICSPHYSICS
- 22Define conductor and insulator.Conductor- allows movement/transmission of electrons through a substance.
Insulator-resists movement of electrons within a substance - 23What is an electroscope?Electroscope is an instrument that can detect a static charge
- 24Define grounding.grounding- process of connecting a charged object to the earths surface.
- 25Define Current (I)Current- continuous flow of electrons in a circuit.