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Introduction to Atoms
Organizing the Elements
Metals
Nonmetals, Inert Gases and Semimetals
Radioactive Elements
100
The smallest part of of an element
what is a atom
100
an arrangement of elements showing the repeating pattern of their properties
What is the periodic table
100
The majority of elements in the periodic table
What is metals
100
The air you breathe in is mostly a mixture of two non metals
What is nitrogen and oxygen
100
a French scientist that discovered the effects of radioactive decay
who is Henri Becquerel
200
The three parts of an atom
What is a proton, neutron, and electron.
200
Each element contain in their square on the periodic table
What is atomic mass ,chemical symbol,elements name, and the atomic mass
200
Metals good for
What is a good conductor of electric current and heat
200
The two nonmetals that are at room temperature and turn into gas
What is oxygen and nitrogen
200
Radioactive decay
What is the nuclei of unstable isotopes release fast moving particles and energy
300
An atom with the same element but different number of neutrons
What is isotopes
300
Mendeleev noticed that he arranged the elements in order
What is a pattern of properties
300
The physical properties of metal
What is malleability ,ducktiity , luster, jawd conductility
300
When atoms of nonmetals combine with other atoms
What is gain or share electrons
300
The fastest alpha particle
What is beta particles
400
The sum of the protons and nuetrons in the nucleus of an atom
What is mass number
400
Number of groups and periods that are in the periodic table
What is 7 periods and 18 groups
400
The group that lithium and francium are in the periodic table and belong to
What is group 1 and alkali
400
Inert gases reactive or unreactive
What is unreactive
400
The three things that radioactive can produce
What is alpha particles, beta particles , and gamma rays
500
The number of protons and electrons isotopes have
What is 6
500
Two groups are known to cause irritation in the lungs and form similar compounds
What is fluorine and chlorine
500
Definition and uses of semiconductor
What is conduct electricity and only under certain conditions
500
Uses of tracers
What is the use to find weak spots in the metal pipes, or pipelines