Vocabulary 1
Vocabulary 2
Main Idea
Critical Thinking
Critical Thinking
100
A pure substance made of two or more elements that are chemically combined is a(n)
Compound
100
The smallest particle of an element that still has the properties of that element is a(n)
atom
100
Three groups into which elements can be classified based on their properties are
metals, nonmetals, and semimetals
100
Carbon dioxide, a nonmetal, is not on the periodic table. Why not?
Carbon dioxide is not an element; it is a compound made up of carbon and oxygen, both of which are elements on the periodic table.
100
Each column in the periodic table is called a __________.
group
200
A negatively charged particle that is part of an atom is a(n)
electron
200
An element that can be bent or stretched and is usually shiny is probably a(n)
metal
200
True or False: A group of two or more atoms that are chemically joined and then act as a simple unit is called an element.
False. It is called a molecule.
200
The atomic numbers tells the number of ______________ in the nucleus.
Protons
200
______________ are usually shiny, can be bent or stretched, and conduct electricity.
Metals
300
Elements are shown arranged by their properties in a chart called the
periodic table
300
A small, positively charged particle is a(n)
proton
300
Which two particles in an atom contribute most ot the mass of the atom?
Protons and Neutrons
300
The atomic number of Sulfer is 16. How many protons does it have in its nucleus?
16 protons
300
_______________ are like metals in some ways and like nonmetals in other ways.
Semimetals
400
A substance that cannot be broken apart chemcially into other substances is a(n)
element
400
The abbreviation of en element's name is its
chemical symbol
400
What was the name of the Russian chemist who developed a way to arrange and classify the elements?
Dmitri Mendeleyev
400
The atomic number of Sulfer is 16. How many electrons are circling the nucleus?
16 electrons
400
Solid _____________ are usually dull in color, do not conduct electricity, do not bend or stretch very much, and break easily.
nonmetals
500
An element that hardly ever combines with other elements to form a compound is a(n)
noble gas
500
The structure in the corner of an atoms is the
nucleus
500
True or False: Only some elements in a column of the periodic table have similar properties.
False. ALL the elements in a column of the periodic table have similar properties.
500
The horizontal rows in the periodic table are called ___________.
periods
500
The last column, or group, of the periodic table is made of _____________.
noble gases
M
e
n
u