Atomic Structure
What are the three subatomic particles?
What is protons, neutrons, and electrons?
Which scientist first proposed that all matter is made of tiny, indivisible particles called "atomos"?
Who is Democritus?
What is the periodic table?
What is a chart that organizes all known elements by atomic number and properties?
The location of metals on the periodic table
What is on the left side and center of the periodic table?
What does "malleable" mean?
What is able to be hammered or bent into a thin sheet without breaking?
Where are protons and neutrons located in an atom?
Which scientist created the "plum pudding model" that showed electrons scattered throughout a positive sphere?
Who is J.J. Thomson?
The horizontal rows on the periodic table.
What are periods?
Name TWO properties of metals
What are shiny, malleable, ductile, good conductors of heat and electricity, solid at room temperature (except mercury)?
What does "ductile" mean?
What is able to be stretched or drawn into a thin wire?
An atoms has 6 protons, 6 neutrons, and 6 electrons. What is the atomic number of this atom?
What is 6 (atomic number = number of protons)?
What were the four elements that Aristotle proposed everything was made of?
What is fire, air, water and Earth?
The vertical columns on the periodic table
What are groups?
What is a metalloid?
What is an element with properties of both metals and nonmetals?
What is the difference between a conductor and an insulator?
What is A conductor allows heat or electricity to flow through it easily (like metals); an insulator does NOT allow heat or electricity to flow through it easily (like nonmetals)?
What subatomic particle has a negative charge, and where is it located?
What is the electron; located in the electron cloud?
This is the scientist who performed the gold foil experiment and discovered the nucleus.
Who is Ernest Rutherford?
This element is located in Group 2, Period 3
What is magnesium?
Explain why copper (Cu) is used in electrical wiring. Use at least one property of metals in your answer.
What is Copper is used in electrical wiring because it is a metal and a good conductor of electricity, allowing electric current to flow easily through the wire?
What is the atomic number of an element, and what does it tell you?
What is the number of protons in an atom; it identifies the element and determines its position on the periodic table?
An atom has an atomic number of 17 and a mass number of 35. How many neutrons does it have? (show your work)
What is 18 neutrons?
Describe Niels Bohr's model of the atom.
Why are elements in the same group (vertical column) similar to each other?
What is elements in the same group have the same number of valence electrons (electrons in their outer shell), which gives them similar chemical properties?
Silicon (Si) is classified as a metalloid and is used in computer chips. Explain why its properties make it useful for this purpose
What is a semiconductor, meaning it can conduct electricity under certain conditions but not others. This allows it to control the flow of electricity in computer chips and electronic devices, making it useful for technology?
Explain the difference between atomic number and mass number
What is the number of protons in an atom. Mass number is the total number of protons AND neutrons in an atom?