Science IIA- Section 1
Terms
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- 1 amu
- 1/12 of a carbon-12 atom
- A chemical combination of two or more different elements is a(n)?
- compound.
- A chemical reaction that involves one or more substances changing into new substances?
- chemical change
- A heterogeneous mixture is like what?
- a sand-water mixture.
- A homogenous mixture is like what?
- a salt water mixture.
- A mixture is what?
- 2 substances combined.
- a substance that can not be separated into simpler sumbstances by physical or chemical means is a(n)?
- element
- Ag
- Silver
- Al
- Aluminum
- alter w/o changing composition.
- physical changes.
- Aluminum
- Al
- Ar
- Argon
- Argon
- Ar
- Atomic number =
- electrons = protons
- Atomic Number equals what?
- the number of protons.
- Au
- gold
- B
- Boron
- Ba
- Barium
- Barium
- Ba
- Be
- Beryllium
- Beryllium
- Be
- boil
- physical change
- Boron
- B
- Br
- Bromine
- Bromine
- Br
- burn
- chemical change
- C
- Carbon
- Ca
- Calcium
- Calcium
- Ca
- Calculated the mass of an electron
- Millikan
- carbon
- C
- Chlorine
- Cl
- Chromium
- Cr
- Cl
- Chlorine
- Co
- Cobalt
- Cobalt
- Co
- condense
- physical change
- Copper
- Cu
- corrode
- chemical change
- Cr
- Chromium
- crumple
- physical change
- crush
- physical change
- Cu
- Copper
- Determined the mass to charge ratio of an electron
- Thomson
- explode
- chemical change
- F
- Fluorine
- Fe
- Iron
- ferment
- chemical change
- Fluorine
- F
- francium
- element
- freeze
- physical change
- Gold
- Au
- grind
- physical change
- H
- Hydrogen
- He
- Helium
- Helium
- He
- Hg
- Mercury
- How do you calculate the atomic mass of an element?
- you take the mass in amu's of both isotopes and individually multiply them by the percent abundance, then add them together.
- Hydrogen
- H
- I
- Iodine
- ice
- compound
- in isotope notation, how is it written?
- mass number on top, atomic number on bottom.
- Iodine
- I
- Iron
- Fe
- Isotopes of an element have the same # of protons, but different numbers of what?
- neutrons.
- K
- Potassium
- Lead
- Pb
- Li
- Lithium
- Lithium
- Li
- Magnesium
- Mg
- Manganese
- Mn
- melt
- physical change
- Mercury
- Hg
- Mg
- Magnesium
- Mn
- Manganese
- N
- Nitrogen
- Na
- Sodium
- Ne
- Neon
- Neon
- Ne
- Ni
- Nickel
- Nickel
- Ni
- Nitrogen
- N
- O
- oxygen
- oxidize
- chemical change
- Oxygen
- O
- P
- Phosphorus
- Pb
- Lead
- Phosphorus
- P
- Potassium
- K
- proposed the nuclear atomic model
- Rutherford
- rot
- chemical change
- rust
- chemical change
- S
- Sulfur
- separates by formation of solid, pure particles from a solution.
- crystallization.
- separates solids from liquids by using a porous barrier.
- filtration.
- separates substances on the basis of the boiling points of the substances.
- distillation.
- separates when a solid is formed.
- crystallization.
- Shows the relationship between the reactants and products in a chemical change.
- Chemical equation
- Si
- Silicon
- Silicon
- Si
- Silver
- Ag
- Sn
- Tin
- Sodium
- Na
- sodium chloride
- compound
- Sr
- Strontium
- States that mass is neither created nor destroyed during a chemical reaction.
- law of conservation of mass.
- Strontium
- Sr
- Sulfur
- S
- T or F: atomic number is equal to the number of electrons in an atom
- T
- T or F: most atoms have either a positive or negative charge.
- F
- T or F: number of protons in an atom identifies it as an atom of a particular element.
- T
- T or F: the periodic table is arranged by increasin atomic number.
- T
- T or F:The number of neutrons in an atom is referred to as its atomic number
- F
- tarnish
- chemical change
- The atomic mass of an atom is usually not a whole number because it accounts for:
- both the relative abundance and the mass of each of the atom's isotopes.
- The new substances that are formed in a chemical reaction?
- products
- The starting substances in a chemical reaction.
- reactants.
- Tin
- Sn
- vaporize
- physical change
- What are chemical properties?
- the ability of a substance to combine with or change into 1 or more substances.
- What are gases?
- takes the shape and volume of its container.
- What are physical properties?
- characteristic that can be observed without changing the sample's composition.
- What are some characteristics of a neutron?
- n(0), in the nubleus, relative charge of 0, and relative mass of 1
- What are some characteristics of an electron?
- e(-), in the space surrounding the nucleus, relative charge of 1-, relative mass of 1/1840.
- What are some sub-atomic particles?
- proton, neutron, and electron.
- What are the characteristics of a proton?
- p(+), in the nucleus, relative charge of 1+, relative mass of 1
- What are the horizontal rows in the periodic table called?
- periods.
- What are the vertical columns in the periodic table called?
- groups or families.
- What deals with boiling points?
- distillation
- What is a homogenous mixuure?
- it is the same throughout.
- What is a liquid?
- has a definite volume, but takes the shape of its container... has the ability to flow.
- What is a physical property that is independant of how much substance is involved?
- intensive
- What is a solid?
- it has a definite shape and volume.
- What is another name for homogenous mixture?
- solution.
- What is plasma?
- it occurs in nature.
- What is the Law of Conservation of Mass?
- Mass is neither created nor destroyed, it is conserved.
- what is the law of definite proportions?
- states that regardles off the amount, a compound is always composed of the same elements in the same proportion by mass. mass percentage of an element(%) = Mass elem/mass compound x 100
- What is the law of multiple proportions?
- states that if the elements X and Y form two compounds, the different masses of Y that combine with a fixed mass of X chan be expressed as a ration of small whole numbers.
- What is the mass of an electron?
- 9.11 x 10(-28) g
- what is the relative mass of a proton?
- 1
- What kind of physical property depends on how much is present?
- extensive
- What separates by a porous barrier?
- filtration.
- What separates substances based on movement through a special paper?
- chromatography.
- What takes the shape and volume of its container?
- gas
- What type of change can be observed?
- physical
- What's the difference between extensive and intensive properties?
- extensive depends on how much you have (mass, length, volume) while intensive doesn't (density, color, melting point)
- Which of the following is an example of a compound? gold silver aspirin copper
- aspirin.
- Which of the following is an example of an element?
- oxygen.
- Whose Atomic Theory was the most correct?
- John Dalton's
- Zinc
- Zn
- Zn
- Zinc