Atomic Structure
Periodic Table
Atoms
Elements
Scientist
100
The charge of a proton.
What is +1?
100
The periodic table organizes this.
What are the elements based on atomic number?
100
The smallest unit of matter?
What is an atom?
100
An element is.
What is a pure substance made of only one type of atom? Example a bar of gold.
100
This scientist proposed the solid Sphere Model to represent an atom.
Who was John Dalton?
200
The three main subatomic particles.
What are protons, neutrons, and electrons?
200
The horizontal rows in the periodic table.
What are periods?
200
The nucleus of an atom is made of this.
What are Protons and neutrons?
200
This is how many naturally occurring elements that there.
What is 92?
200
This scientist suggested that atoms are made of negatively charged electrons scattered within a positively charged "soup" (like plums in pudding).
Who was J.J. Thomson
300
The atomic number of an element.
What is the number of protons in the nucleus?
300
This group of elements is known as noble gases.
What is group 18?
300
This term tells you the number of protons and neutrons in an atom.
What is the mass number?
300
This element is represented by the symbol 'O'?
What is oxygen?
300
He conducted the gold foil experiment and discovered that atoms have a small, dense, positively charged nucleus, with most of the atom being empty space.
Who was Ernest Rutherford?
400
Subatomic particle that is found outside the nucleus.
What is the Electron?
400
This information can be found in an element's box on the periodic table.
What are the atomic number, symbol, and atomic mass?
400
This is how atoms become ions.
What is by gaining or losing electrons?
400
This element is the most abundant in the universe.
What is hydrogen?
400
He proposed that electrons orbit the nucleus in fixed energy levels or shells, similar to planets orbiting the sun.
Who was Niels Bohr
500
The significance of isotopes in atomic structure.
What are atoms of the same element with different numbers of neutrons?
500
This can help you determine the number of valence electrons from the periodic table.
What is look at the group number?
500
The role of electrons in chemical bonding is.
What is they participate in forming bonds between atoms?
500
This distinguishes metals from nonmetals in the periodic table.
What is metals are typically good conductors of heat and electricity, while nonmetals are not?
500
He is often regarded as the "father of atomism" because he proposed that matter is composed of tiny, indivisible particles called "atoms."
Who was Democritus?