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PS Ch. 17 Review

DHS PS CH 17 Review

QuestionAnswer
What is the smallest piece of matter that still has the properies of the element called? atoms
What has an electrical charge of 1+? protons
What part of the atom has no charge called? neutrons
What has an electrical charge of 1-? electrons
Where are protons and neutrons located in an atom? nucleus
Where are electrons located in an atom? surround the nucleus
Protons and neutrona are made up of smaller particles called? quarks
How many quarks are known to be in extistence? 6
What is the sixth quark called? top quark
What do scientists use to represent atoms? scaled models
What did early models of atoms use to represent atoms? solid sphere
What is the name of the model that shows electrons traveling in specific energy levels around a nucleus of prontons and neutrons? electron cloud
What is the most useful method for describing atoms? constructing a model
An atom that contains 6 positive charges and 6 negative charges has what kind of charge? no net
Scientists have broken down protons and neutrons into smaller particles called? atoms
Democritus believed that the universe was made of what two things? empty space and atoms
Atoms consist of a positively charged center called a? nucleus
The negatively charged particles outside the nucleus of an atom are called? electrons
What is the name of the model of the atom that reflects the unpredictable motion of the electron? electron cloud model
Aristotle believed that matter was? uniform throughout
The discrovy of the sixth quark was accomplished by? studying proton collisions
Which atomic particle is positively charged? proton
What is mostly composed of the protons and neutrons in the nucleus? atomic mass
What is the unit of measurement for atomic particles that is one-twelth the mass of a carbon atom contaiing six protons and six neutrons called? atomic mass unit (amu)
The number of protons in an atom is called the? atomic number
What do we call the sum of the number of protons and neutrons in the nucleus of an atom? mass number
When atoms of the same element have different numbers of neutrons we call this an? isotope
Different isotopes have what kind of properties? different
How do you find the number of neutrons? mass number - atomic number
How do you identify an isotope? Look at the name of the element followed by the mass number
What is the weighted-average mass of an element's isotopes called? average atomic mass
The average atomic mass is closest to its most? abundant isotope
Where does the electron cloud model of an atom place protons, neutrons, and electrons? protons and neutrons are in a center nucleus surround by electrons traveling in specific energy levels
How do atomic number and mass number differ? atomic number = the number of protons in an atom; mass number = the sum of the number of protons and neutrons in an atom
When calculating the mass of an atom, the mass of an electron is? negligible (not significant)
The mass of a proton is measured in? atomic mass units
What are atoms of the same element that have different numbers of neutrons called? isotopes
What is the sum of the number of protons and neutrons called? mass number
How do you find the atomic mass of an element? the number of protons + the number of neutrons of an atom
An isotope of Boron will have a different number of? neutrons
The atomic number of an element is also the number of? protons in the nucleus of an atom of that element
How are elements organized on the periodic table? by increasing atomic number
Who devised the first periodic table based on atomic mass? Dmitri Mendeleev
How was Mendeleev's periodic table organized? by increasing atomic mass and organized and grouped by similar chemical properties.
Who arranged the elements by atomic number rather than atomic mass? Henry G. J. Moseley
How are the vertical colums in the periodic table arranged? in groups of elements with similar properties
Elements in the same group have the same? number of electrons in their outer energy level
The seven energy levels can have a maximum number of? electrons
How many electrons can energy level one contain? no more than 2
How mane electrons can energy level two contain? no more than 8
What do we use the element symbol and dots to represent outer energy level electrons? electron dot diagrams
What are the horizontal rows of elements that contain increasing number of protons and electrons called? periods
How are the elements calssified? metals, nonmetals, or metalloids
What are the building blocks of other naturally occurring elements? hydrogen and helium
What spreads heavier elements througout the universe? supernovas
What do elements in the same group have in common? the same number of elelctrons in the outer energy level
Each inner energy level of an atom has a muximum nuber of what that it can hold? electrons
What is the method of representing atoms and the electrons in their outer energy levels called? electron dot diagram
Elements belonging to the same _________ will have similar properties. group
What are the three general groups of elements? metals, metalloids, and nonmetals
What do we call the chart created by chemists to organize the elements according to repeated changes on properties? periodic table
The name of every element can be abbreviated using a ______? chemical symbol
Who was credited with organizing the very first periodic table? Mendeleev
Where on the periodic table are the metals located? left side
All alements in Group 1 would have how many dots in their electron dot diagram? one
A capital letter or a combination of a captial letter and a small letter that is used to represent an element is called? chemical symbol
The horizontal rows of elements on the periodic table are called? periods
An average of the masses of all the isotopes that occur in nature for an element is the? average atomic mass
The vertical columns of elements on the periodic table are called? groups or families
Elements in the middle of the periodic table, groups 3-12, are called the? transition metals
The number of protons in an atom is the? atomic number
Protons and neutrons can be subdivided into this by colliding them? quarks
the center of an atom where proton and neutrons are located is the? nucleus
A total count of the neutrons and protons in an atom is the? mass number
Atoms of the same element but with different numbers of neutrons are? isotopes
Elements that are found on the left side of the periodic table are? metals
Elements that have some properties of both metals and nonmetals are called? metalloids
The particles that move about the nucleus and have a negative charge are? electrons
The region around the nucleus occupied by electrons is a? electron cloud
A chart that shows the classification of elements is called the? periodic table
An atoms is comprised of waht three components? proton, neutron, and electron
What has a charge of +1? proton
What is the smallest part of an element that retains all the properties of the element? atoms
According to the modern conept of the atom, what is located in the nucleus of an atom? protons and neutrons
Each inner energy level of an atom has a maximum number of _______ that it can hold. electrons
Dot diagrams are used to represent? outer level electrons
Particles of matter that make up protons and neutrons are? quarks
What does a chemical symbol represent? name of an element
Where at on the peroidic table would you find the lightest elements? top left
Where at on the periodic table would you find the heaviest elements? bottom right
If you change the number of protons in an atom, you change the? element
Elements from the same group/family have what in common? the same number of valence electrons
Which elements have similar properties? elements from the same group or family
What method would be most useful for describing atoms? constructing a model
Scientists have broken down protons and neutrons into smaller particles called? quarks
Atoms consist of a positively charge center called a? nucleus
An isotope of Carbon would have a different number of? neutrons
The number of neutrons plus protons is called? mass number
What are the 6 quarks names? Up, Down, Strange, Charm, Bottom, Top
Name the scientist that offered proof that Democritus was correct? John Dalton
What did Aristotle believe? That matter was uniform throughout and was not composed of smaller particles
How many atoms stacked one on top of another would it take to equal the thickness of a sheet of aluminum foil? 24,400
What is the name of the 1st group? Alkali metals
What is the name of the 2nd group? Alkaline Earth metals
What is the name of the 3rd - 12th groups? Transition metals
What is the name of the 13th group? Boron group
what is the name of the 14th group? Carbon group
What is the name of the 15th group? Nitrogen group
What is the name of the 16th group? Oxygen group
What is the name of the 17th group? Halogen group
What is the name of the 18th group? Noble Gases group
Created by: basmith