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tannaexamstudyguide

Exam Study Guide

QuestionAnswer
Study of the composition and structure of materials and the changes that materials undergo best describes the science of Chemistry
The branch of chemistry concerned with the properties, changes, and realtionships between energy and matter is Physical Chemistry
The study of substances containing carbon is Organic chemistry
An example of extensive physical property is mass
The particles in a solid are packed closely together
The state of matter in which a material has a definite volume but no definite shape is liquid state
The most useful source of chemical information about the elements is a periodic table
The elements that border the zigzag line in the periodic table are metalloids
A vertical column of blocks in the periodic table is called group
Elements in a group in the periodic can be expected to have similar properties
Chemistry is the study of? elements
2.Gamma rays are electromagnetic waves
The smallest unit of an element that can exist alone or in a combination with other such particles is an? atom
Who called the "atom" an atom? Democritus
A nuclide is identified by the number of protons and neutrons in its nucleus
what is the atomic number for tungsten 74
In a glass tube, electrical current passes from the negative electrode, called the ________ to the other electrode Cathode
Radioactive tracers are used to follow the movement of substances in a system
What scientist discovered electrons? J.J Thompson
Organic Chemistry is the study of? carbon containing compounds
In SI, the frequency of electromagnetic radiation is measured in Hertz
One of the wave properties of electromagnetic radiation, such as light, is frequency
As it travels through space, electromagnetic radiation exhibits wavelike behavior
A quantum of electromagnetic energy is called a(n) photon
The wave model of light did not explain the photoelectric effect
Max Planck proposed that a hot object radiated energy in small, specific amounts called quanta
How many quantum numbers are needed to describe the energy state of an electron in an atom? four
For the f sublevel, the number of orbitals is seven
the total number of orbitals that can exist at the second main energy level is four
how many groups are found on the periodic table? 18
What are the radioactive elements with atomic numbers 90 to 103 in the periodic table called? the actinides
Which group do lithium and patassium belong? alkali metals
Mendeleev predicted that the spaces in his periodic tabl represented undiscovered elements
Argon, Krypton, and Xenon are noble gases
one-half the distance between the nuclei of identical atoms that are bonded together is called atomic radius
A horizonatal row of blocks in the periodic table is called period
The person whose work led to a periodic table based on increasing atomic number was Moseley
The group of 14 elements in the sixth period that have occupied 4f orbitals is the lanthanides
A positive ion is callled a cation
A negative ion is called a anion
Quantitative observations are recorded using numerical information
A testable statement used for making predictions and carrying out further experiments is a hypothesis
The SI standard units for length and mass are meter and kilogram
the symbol for the metric unit used to measure mass is g
The symbol that represents the measured unit for volume is mL
The SI base unit for time is the second
The most appropriate SI unit for measuring the length of an automobile is the meter
A change in the force of Earth's gravity on an object will affect its weight
the number of significant digits in 0.000305 kg is 3
the number of significant figures in 170.040 is 6
A mutal electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together is called a(n) chemical bond
Atoms are ________ when they are combined more stable
The chemical bond formed when two atoms share electrons is called a covalent bond
a covalent bond results when _________ are shared electrons
most chemical bonds are partly ionic and partly covalent
a neutral group of atoms held together by covalent bonds is a molecule
An octet is equal to 8
The elements of the __________ group satisfy the octet rule wothout forming compunds noble gases
How many double bonds are in the Lewis structure of HF? 0
The electron-sea model of bonding represents metallic bonding
Created by: tannagarrison