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Austin C
Chem Study Guide Exam
Question | Answer |
---|---|
The branch of Chemistry concerned with the identification and compisition of materials. | Analyical |
Carried out for the sake of increasing knowledge. | Basic Research |
These properties include changes that alter the identity of a substance. | Chemical Properties |
Carried out to solve a problem. | Applied research |
Particles in a solid state are? | packed closely together |
State of matter in which material has neither a definite shape nor definite volume | Gaseous State |
Elements that border the zig-zag line in the period table. | Metalloids |
A vertical column of blocks on the periodic table. | Group |
Elements in a group can be expected to have similar | properties |
In what state does the material has a definite volume but no definite state | liquid state |
A testable statement used for making predictions and carrying further experiments | Hypothesis |
Symbol for metric unit used to measure mass | Gram |
The symbol that represents the measured unit for volume | mL |
SI unit for time | Second |
A change in the earth's gravity on an object will affect its? | weight |
to calculate an objects density you divide its mass by is? | volume |
Number of significant digits in the measurement 210cm is | two |
The graph of a direct proportion is a | straight line |
The SI standards for lenght and mass | meter kilogram |
Number of significant digitd in 170.040 | six |
School master who studied chemistry and proposed an atomic theory | John Dalton |
DIscovered the nucleus by bombarding gold foil with positivly charged particles | Rutherford |
Smallest unit of an element that can exist alone or in combination with other such particles? | atom |
Nickel-60 has ____ neutrons | 32 |
Aluminium has an atomic number of | 13 |
Which of the following proceses always decreases the number of protons by an even number | alpha decay |
What unit measures radiation damage to human tissue | rem |
Who called the 'atom' the atom | Democritus |
What unit measures radiation | roentgen |
In a glass tube, electrical current passes from the negative electrode, called the _____ to the other electrode. | cathode |
As it travels through space , electromagnetic radiation exibits what type of behavior | wavelike |
The distance between two successive peaks on a wave | wavelength |
A quantum of electromagnetic energy | photon |
Main energy level that can hold only two electrons | first |
The atomic sublevel with the next highest energy after 4p | 5s |
An element with eight electrons in its highest energy level | noble gas |
Which group is halogens | 17 |
How many periods are on the periodic table | 7 |
How many groups are on the periodic table | 18 |
The statement that electron occupies the lowest avalible energy orbital | Aufbau Principle |
Elements with atomic numbers 58-71 in the periodic table | lanthanide |
Argon, krypton, and xenon are | noble gases |
Person whose work led to a periodic table based on increasing atomic number | Moseley |
Mendeleev attempted to organize the chemical elements based on there | properties |
Period 4 contains 18 elements. How many of these elements are in the d sublevel | 10 |
Elements in the d sublevel have properties of | metals |
Measure of the ability of an atom in a chemical compuond to attract electrons is an atom's | electronegativity |
Postive ion | cation |
Negative ion | anion |
The most characteristic property of the noble gases | largely unreactive |
An octet is equal to | 8 |
The chemical bond formed when two atoms share electrons | covalent bond |
If two covalently bonded atoms are identical the bond is | nonpolar covalent |
Most _______ _________ are partly ionic and partly covalent | chemical bonds |
The electrons involved in the formation of a chemical bond | valence |
Atoms are _____ stable when they are combined | more |
The electron- sea model bonding represents | metallic bonding |
If a mateial can be shaped or xtended by physical pressure, such as hammering, which property does the material have? | mallealbility |
In drawing a Lewis structure, each nonmetal atom except hydrongen should be surrounded by how many electrons | 8 |
Compared to ionic compounds, molecular compounds have _______ melting points | lower |