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65 Cards in this Set
- Front
- Back
A chemical can be defined as |
Any substance that had a definite composition |
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inorganic chemistry is the study of |
Non-carbon related compounds |
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Biochemistry is the study of |
The chemistry of living things |
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Organic chemistry is the study of |
Carbon-containing compounds |
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Basic research is usually performed |
To gain knowledge |
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Which is an intensive property of matter? Amount of energy, density, volume, or mass? |
Density |
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A measure of the quantity of matter is |
Mass |
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A true statement about mass is that |
Mass is determined by comparing the mass of an object with a set of standard masses that are part of a balance |
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An example of a chemical change occurring is |
A leaf changing colors in the fall |
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A homogenous mixture is also called |
A solution |
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A scientist is working to determine the properties and chants of matter and their relation to energy of a newly discovered mineral. She is working in the field of |
Physical chemistry |
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Two scientists are trying to determine the exact nature of the chemicals in lava flow. They are working in the field of |
Analytical chemistry |
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In a bonfire, oxygen allows wood to combust, leaving behind ashes. In this process, oxygen and wood are the reactants, and ashes are the |
Product |
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A scientist is working to develop better dating methods for substances that contain carbon. He is working in the feild of |
Organic chemistry |
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A scientist is using mathematical models to isolate a new chemical process. He is working in the field of |
Analytical chemistry |
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Basic research is performed to increase |
Knowledge |
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applied research is often preformed to find the answer to a particular |
Problem |
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When examining a mineral, hardness and color are two of the properties used for identification. They are examples of |
Physical properties |
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An Apple turning brown after being cut its am example of a |
Chemical change |
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The melting of butter is what, and why? |
It is a physical change because our does not produce any new substances |
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A sample of matter can be poured from container to container. It takes the shape of the container, but only takes up a certain volume. Based on this information, the sample is a in the |
Liquid state |
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An alloy, such as a a good ring, is an example of a |
Homogenous mixture |
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Gravel is an example of a |
Heterogeneous mixture |
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Standard of measurement are chosen because they |
Are reproducible in another laboratory |
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Is the statement "a standard can be easily changed to suit the experiment" trite our false? |
False |
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Which one is NOT an SI base unit? Kilogram, second, liter, or Kelvin? |
A liter |
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The SI base units for length and time are |
Meter and second |
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The symbols for units of length in order from largest to smallest are |
Km, m, cm, mm |
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The SI unit for length is |
The meter |
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Which is NOT an SI unit for density? Kg/m3, kg/L, g/cm3, or g/m2? |
g/m2 |
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Is the statement "The mass of Ann object is determined by comparing it to an object of known mass" true or false? |
It is true |
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When density is measured |
The temperature should be specified |
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Is the statement "density is a physical property" true or false? |
It is true |
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100 mL (milliliter) is equal to |
1 deciliter |
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0.25 g is equivalent to |
250 mg |
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1.06 L of water is equivalent to |
1,060 mL |
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A chemist obtained the values 5.2246 g, 5.2353 g, and 5.2501 g for the mass of a sample. It can be said that these values have |
Poor precision |
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The graphs of two variables that are inversely proportional to one another are |
A hyperbola |
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Visible light, x- rays, infrared radiation, and radio waves all have the same |
Speed |
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Which model of the atom explains the orbitals of electrons as waves? |
The quantum model |
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The size and shape of Ann electron cloud are most closely related to the electron's |
Energy |
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Both the Heisenberg uncertainty principle and the Schrödinger wave equation |
Led to the concept of atomic orbitals |
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An orbital that can never exist according to the quantum description of the atom is |
3f orbital |
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Moseley's work led to the realization that statement with similar properties occurred at regular intervals when the elements were arranged in order of increasing |
Atomic number |
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Hydrogen is placed separately from other elements in the periodic table because it |
Has many unique properties |
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The group of soft, silvery, reactive metals, all of which have one electron in an s orbital, is known as the |
Alkali metals |
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The first member of the noble gas family, whose highest energy level consists of an octet of electrons, is |
Neon |
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When an electron is added to a neutral atom, a certain amount of energy is |
Either released our absorbed, or always released |
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A measure of the ability of an atom in a chemical compounds to attract electrons from another atom in the compound is called |
Elextrpnegativity |
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A positive ion is known as a |
Cation |
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The alkaline earth group, the atoms with the snakes radii |
Have the highest ionization energies |
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Across a period, innovation entries of d- block elements generally |
Increase |
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If two covalently bonded atoms are identical, the bond is |
Nonpolar covalent |
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in the three molecules O2, HCl, and F2, what atom would have a partial negative charge? |
Chlorine |
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Bonding in molecules or ions that cannot becorrectly represented by a single Lewis structure is |
Resonance |
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The chemical formula fire an ionic compound represents the |
Ratio of the combined ions present in a sample |
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The lattice energy is the measure of the |
Strength of an ionic bond |
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If the lattice energy of compound A is greater than that of compound B, |
The bonds in A are stronger than those in B |
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Compared with ionic compounds, molecular compounds |
Have lower melting points |
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The forces of attraction between molecules in a molecular compound are |
Weaker than the forces among formula units in ionic bonding |
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A chemical bond formed by the attraction between positive ions and surrounding mobile electrons is a |
Metallic bond |
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As light strikes the surface of a metal, the electrons in the electron sea |
Absorb and re- emit the light |
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The chemical bond of metals and ionic crystals explains |
Why metals are malleable and why ionic crystals are brittle |
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Compared with molecular bonds, end strength of force is |
Weaker |
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The equal but opposite charges present in the two regions odd a polar molecule create a |
Dipole |