Atoms and Elements
Periodic Table
Metals
Nonmetals and Metalloids
key terms
100
If the atomic number is 3 and the atomic mass is 6.941. How many nuetrons, electrons, and valence electrons does the atom have
nuetrons- 4 electrons- 3 valence electrons- 1
100
What is a row called
a period
100
How do Chemists classify an element as a metal
they base it on physical properties such as hardness, shininess, malleability, and ductility.
100
What is a nonmetal
a nonmetal is an element that lack most of the properties that metals have
100
What is the definition of atomic mass
the average mass of the elements atom
200
What are the 3 states of matter?
Liquid Gas Solid
200
What is a column called
a group
200
What is a conductor
a conductor can transmit heat and electricity easily
200
What is different about metals and nonmetals properties
nonmetals have the opposite properties of metals
200
What is the key term of the definition a positivley charged particle that is apart of the atom
a proton
300
What makes up an atom
protons electrons nuetrons
300
a family is another name for...
a group
300
What is an alloy
an alloy is a mixture of metals
300
What are metalloids
elements taht have some of the characteristics of metals and nonmetals
300
What is the definiton of reactivity
the ease and speed elements or compounds combine with others
400
What are the elements organized in
The periodic table
400
What is the periodic table organized by
atomic number
400
What do metals in a group or family share
They have the same properties and these family properties change gradually as you move across the table
400
What kind of conductors are metalloids
Metalloids are semiconductors. Semiconductors are substances that under some conditions can carry electricity and in other conditions it can't
400
What is the name of elements that belong in group 17
the halogen family
500
What does the atomic mass stand for
The average mass of 1 atom of the element
500
Who created the Periodic table
Dmitri Mendeleev
500
What are the different types of metals
Alkali metals Alkaline earth metals Transition metals
500
What are the families of
nonmetalsThe carbon family The nitrogen family The oxygen family The halogen family The noble gases
500
What is a noble gas
an element in group 18
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