Upgrade to remove ads
Only $2.99/month

Chapter 16 Test-Properties of Atoms and the Periodic Table

Terms in this set (49)

Two elements with the same number of protons but a different number of neutrons
isotopes
the weighted-average mass of all the known isotopes for an element.
average atomic mass
The positively charged center of an atom is called the ...
nucleus
The particles that make up protons and neutrons are called ...
quarks
A(n) ... is a horizontal row in the periodic table.
period
The ... is the sum of the number of protons and neutrons in an atom.
mass number
electrons are located here
electron cloud
Most of the elements to the left of the stair-step line in the periodic table exist .... at room temperature.
liquids
What is the term for a repeating pattern?
periodic
Which element has properties that are similar to neon?
argon
Which term describes boron?
metalloid
How many outermost electrons do lithium and potassium have?
1
What is NOT found in the nucleus of an atom?
electron
In what state is nitrogen found at room temperature?
gas
What element is a shiny element that conducts heat and electricity?
magnesium
The atomic number of Re is 75. The atomic mass of one of its isotopes 186. How many neutrons are in an atom of this isotope?
111
The smallest particle of an element that retains the element's properties.
atom
The small, positively charged center of the atom
nucleus
particles in the nucleus with an electric charge of 1+
Protons
electrically neutral particles in the nucleus; they do not have a charge
Neutrons
particles with an electric charge of 1- ; they occupy the space surrounding the nucleus of an atom
Electrons
Protons and neutrons are composed of smaller particles called ....
quarks
the area around the nucleus of an atom where electrons are most likely to be found
electron cloud
the number of protons in an atom's nucleus (equal to ?)
atomic number
Atoms of the same element that have different numbers of neutrons are called ...
isotopes
The ... of an element is the weighted average mass of all naturally occurring isotopes of an element.
average atomic mass
Arrangement of elements, arranged by increasing atomic number-not atomic mass- and by periodic changes in physical and chemical properties
periodic table
The horizontal rows of elements in the periodic table numbered 1-7 are called ...
periods
The vertical columns in the periodic table numbered 1-18 are called ...
groups
a diagram used to represent an element's outermost electron; uses the chemical symbol of an element surrounded by dots to represent the number of electrons in the outermost energy level
electron dot diagram
boron and silicon are...
metalloids
oxygen, bromine, and carbon are ...
nonmetals
iron, zinc, and copper are ...
metals
positive charge
proton
negative charge
electron
no charge
neutron
A capital letter or a combination of a capital letter and a small letter that is used to represent an element is called a(n) ...
chemical symbol
Elements in the middle of the periodic table, groups 4-7, are called the ...
metals
Elements that have some properties of both metals and nonmetals are ...
metalloids
Each energy level of an atom has a maximum number of ...
electrons
Dot diagrams are used to represent ...
outer electrons
Particles of matter that make up protons and neutrons are ...
quarks
A chemical symbol represents the ... of an element.
name
Horizontal rows of the periodic table are called ...
periods
Atoms of the same element with different numbers of neutrons are called ...
isotopes
A particle that moves around the nucleus is a(n) ...
electron
Elements in groups 3 - 12 are called ...
transition elements
The ... is used to accelerate protons in the study of subatomic particles.
Tevatron
A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is ...
56
THIS SET IS OFTEN IN FOLDERS WITH...