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Daniel Moore Exam

Exam Study Guide

QuestionAnswer
The branch of chemistry that includes the study of materials and processes that occur in living things is biochemistry
The study of substances containing carbon is organic chemistry
Basic research is carried out for the sake of increasing knowledge
A physical property may be investigated by melting ice
Two features that distinguish matter are mass and volume
Group what in the periodic table contains only metals. 2
An example of extensive physical property is mass
The most useful source of chemical information about the elements is a periodic table
Which is not a property of metals? unreactivity
A vertical column of blocks in the periodic table is called an period
The unit m3 measures volume
all of the following are examples of units except weight
The symbol for the metric unit used to measure mass is g
Standards are chosen because they are reproducble in another labratory
Quantative observations are recorded using numerical information
The SI unit for time is second
How many minutes are in a week? 10,080
To calculate the density of an object divide its mass by volume
A change in the force of the Earths gravity on an object will affect its weight
Poor precision in scientific measurement may arise from human error and limitations of the instrument
the number of sig figs in the measurement 210 is 2
Gamma rays are electromagnetic waves
Phosphorus 33 contains 18 neutrons
Sulphur 34 contains 18 neutrons
Nickel 60 has 32 neutrons
What is the atomic number for tungsten? 74
Who called the atom the atom? Democritis
Chlorine 35 has 17 protons
What does the 218 represent in polonium 218? the mass number
Radioactive tracers are used follow the movement of substance in a system
What is the atomic number for aluminum 13
Distance between 2 successive peaks on a wave is wavelength
An element with 8 electrons in its highest main energy level is a noble gas
Which group is the noble gases? 18
The atomic sublevel witht the next highest energy level after 4p is 5s
The number of orbitals for the d sublevel is 5
For the f sublevel the number of orbitals is 7
The main energy levels of an atom are indicated by the principal quantum numbers
How many groups are found on the periodic table? 18
As it travels through space electromagnetic radiation exhibits wavelike behavior
The part of the atoms where the electrons CANNOT be found is nucleus
To which group do lithium and pottassium belong? alkali metals
Mendeleev attempted to organize the chemical elements based on their properties
Mendelev predicted that the spaces in his periodic table represents undiscovered elements
Argon, krypton, and xenon are noble gases
the horiontal row of blocks in the periodic table is period
One half the distance between the nuclei of identical atoms that are bonded together atomic radius
The person whose work led to a periodic table based on increasing atomic number Mosely
Valence electrons are in the highest energy level
The number of valence electrons in Group 17 elements is 7
How many protons does an atom of Antimony have? 85, 51, or 74. None of these is answer.
Atoms are ___ when they are combined? more stable
If the atoms that share electrons have an unequal attraction for the electrons, the bond is polar
A covalent bond results when ____ are shared? electrons
Most chemical bonds are partly ionic and partly covalent
An octet is equal to 8
The chemical bond formed when 2 atoms share electrons is called covalent bond
To draw a Lewis structure one must know the number of valence electrons in each atom
How many double bonds are in the Lewis structure for hydrogen flouride? none
Malleability and ductibility are characterisitics with substances with metallic bonds
If a material can be shaped or extended by physical pressure which property does the material have? Malleability
Created by: Daniel Moore
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