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Science

ugh

QuestionAnswer
which of the following is/are not a chemical property(ies) of matter: Reactivity, Acidity, Density, Color Density and Color
If an oil (density = 0.8 g/mL) was added to water, would it settle above or below the water? above
Which two of the following are examples of a physical change: Burning leaves, Baking soda and vinegar producing CO2, Dissolving cool-aid in water, melting ice, iron rusting Dissolving cool-aid in water and melting ice
Which state of matter has no definite shape or volume: Solid, Liquid, Gas Gas
Which state of matter has no definite shape, but does have a definite volume Liquid
What is the freezing temperature of a substance that on a graph goes down at 90, levels out at 80 then drops. 80 degrees celsius
According to the graph before, as a substance freezes the temperature remains constant
Define Isotope two atoms that differ in # of neutrons and mass
define compound two or more elements bound chemically
define mixture two or more elements that can be physically seperated
define solution physical mixture of two or more substances
define element (periodic table) simplest form that retains property of substance
which examples represent a chemical change: Burning leaves, Baking soda and vinegar producing CO2, Dissolving cool-aid in water, melting ice, iron rusting Burning leaves, Baking soda and vinegar producing CO2, Iron rusting
define solute substance that is dissolved
define solvent substance doing the dissolving
define solution solute + solvent
Rutherford used a Gold Foil experiment to explain the structure of the atom. What did his experiment show? The atom is mostly empty space. Nucleus is center.
Atomic Number The amount of protons
Proton positive charge, in nucleus, with a mass of one
Neutron neutral charge, in nucleus, with a mass of one
Electron negative charge, outer rings, without mass
mass number total mass or the sum of protons and neutrons
if an atom is neutral the number of _______ and _________ must be the same. protons and electrons
how many electrons do you need to make an atom with eleven protons neutral 11
which atom has 11 protons Sodium
how many protons, neutrons, and electrons are found in Bromine 35 protons, 45 neutrons, and 35 electrons
An ion of calcium has 20 protons and 18 electrons. An ion of Lithium has 3 protons and 2 electrons. These ions would... repel
potassium is in group 1 on the periodic table. predict the ion that potassium will form when reacting. K+1
Oxygen in group 16 on the periodic table forms an ion when reacting. Predict the ion that oxygen will form. O-2
The noble gases, group 18, don't form ions and don't react. Why is this? The outside electronic shell is filled = stable, 8 valence electrons
what is the chemical symbol for Antimony Sb
What is the chemical symbol for Phosphorous P
what is the chemical symbol for Tungsten W
what isthe chemical symbol for Xenon Xe
Elements in group 15 of the periodic table,such as Nitrogen have ___ valence electrons 5
valence electrons are significant because they: are involved (transferred or shared) in chemical reactions
Choose the maximum number of electrons that can fill the first, second and third respective energy levels 2,8,8
What is the charge of the following ion? 8 protons, 7 neutrons, 10 electrons -2
Which ion has 8 protons, 7 neutrons, 10 electrons and a charge of -2 O -2
Which of the following would gain electrons during chemical bonding: Calcium, Lithium, Sulfur, and Chromium Sulfur
The sharing of electrons by atoms is called Covalent bonding
The transfer of electrons by atoms are called Ionic Bonding
Which two elements are most likely to form an ionic bond: Magnesium and Lithium, Strontium and Chlorine, Sulfur and Oxygen, Magnesium and Sulfur Strontium and Chlorine
Which element would be most likely to combine with lithium: Beryllium, Iron, Fluorine, Barium Fluorine
Which two elements are most likely to form a covalent bond: Magnesium and Lithium, Strontium and Chlorine, Sulfur and Oxygen, Magnesium and Sulfur Sulfur and Oxygen
If sodium has an oxidation number (charge) +1, and Sulfur has an oxidation number (charge) of -2, what is the correct formula for the compound Na2S
How can one distinguish that a chemical change has taken place Atomic bonds are broken and created, A new substance forms, A change in energy takes place (gaining or loosing energy)
Balance the following equation: ______ C2H6 + ______ O2 ---> ______ CO2 + _______ H2O 2C2H6+7O2 ---> 1CaSO3+2Na
Balance the following equation: ______ Na2SO3+ ______ Ca ---> ______ CaSO3 + ______ Na 1Na2SO3+1Ca ---> 1CaSO3+2Na
Which of the following is not a chemical reaction: Roasting a marshmallow, Dissolving sugar in tea, Oxidizing (patina) a copper statue, Grinding up a crystal to a fine powder Dissolving sugar in tea, Grinding up a crystal to a fine powder
When dissolving sugar in tea, sugar is the ______ and water the ______ Solute, Solvent
Elements in the first group or family in the periodic table usually ____ electrons to form an ion with a charge of __ Lose,+1
Elements in group 17, or the halogens usually ____ electrons to form a __ ion Gain,-1
Which of the following would be most likely to lose electrons: Carbon, Oxygen, Calcium, Fluorine Calcium
Which of the following atoms would be most likely to combine with fluorine: Chlorine, Bromine, Sulfur, Strontium Strontium
Alka-Seltzer is dissolved in an air tight container, and a gas evolves from the solution. The mass of the container is The same before and after the reaction
If a reaction is endothermic, the products have ____ energy than the reactants more
The dissolution of Sodium Hydroxide in water is an exothermic reaction. When dissolving the salt, the beaker of water will become ___ to the touch Hot
Methods to increase the speed of a reaction include Increased temp (for endothermic), decrease surface area, addition of a catalyst, stirring or mixing, increased concentration
Acids taste ____, bases taste ______ sour, bitter
Acids turned indicator paper ___ in our lab red
Bases turned our indicator paper ____ in lab blue
The following is a(n) ____ reacting with a metal: HCl + Al ---> AlCl3 + H2 Acid
you mix equal volumes and concentrations of an acid and a base. The resulting pH would be exactly 7
An organic compound is based on which atom Carbon
Which of the following hydrocarbons is unsaturated: H3C---CH3, H2C==Ch2, H3C---CH2OH H2C==CH2
what is the monomer (building block) for proteins Amino acids
What is made of monomers called fatty acids. Lipids
What is Alpha radiation Helium nuclei
Beta radiation An electron
Gamma radiation Ray (not a particle)
Which radioactive decay is the most penetrating Gamma
Which radioactive decay is the least penetratin Alpha
Created by: anikabingham