Show:
Introduction to Atoms
Organizing the Elements
Metals
Nonmetals, Inert Gases and Semimetals
Radioactive Elements
100
What is an atom.
What is the smallest part of an element?
100
What is an arrangement of elements
What is the periodic table?
100
What is nitrogen and oxygen.
The air you breathe is mostly a mixture of which two nonmetals?
100
What is nitrogen and oxygen.
The air you breathe is mostly a mixture of which two nonmetals?
100
what is Radioactive decay
The french scientist Henri Becquerel discovered the effects of what?
200
What are protons, neutrons, and electrons.
What are the three parts of an atom?
200
What is the atomic number, chemical symbol, element's name, and atomic mass.
What does each element contain in their square on the periodic table?
200
What is a good conductor of electric currents and heat.
What is a metal good for?
300
What is the mass number.
What is the sum of the protons and neutron in the nucleus of an atom?
300
What are the pattern of properties.
What did Mendeleev notice when he arranged the elements in order?
300
What
What are the physical properties of a metal?
400
What are isotopes.
What is an atom with the same element but different numbers of neutrons?
400
What are 7 periods and 10 groups?
How many groups and periods does the periodic table have?
500
what
How do carbon isotopes react, even if they're mass number are different?
500
What is fluorine and chlorine?
What two gases are known to cause irritation in the lungs and form similar compounds?