Development of the Atomic Theory
The smallest particle into which an element can be divided and still have the properties of that element.
What is an atom?
The positively charged part of an atom.
What is an atom?
The "founder" of the Periodic Table of Elements. (First and last name)
Who is Dmitri Mendeleev?
The name for the elements of Group 1 on the periodic table.
What are alkali metals?
Name an element in Group 13.
J.J. Thompson is responsible for discovering this.
What is the electron.
The location of electrons in an atom.
What are electron clouds?
The periodic table is composed mostly of ______
What are metals?
Transition metals are in which groups of the periodic table?
What are Groups 3-12?
Na is the chemical symbol of _____
What is sodium?
Which scientist discovered electron clouds?
What is Schrodinger and Heisenberg?
The 3 subatomic particles in an atom.
What are protons, neutrons, and electrons?
The Periodic Table is organized in _______
What is increasing atomic number?
The least reactive elements.
What are noble gases?
Who Ernest Rutherford.
Improvements Bohr made to the atomic theory.
What is suggesting electrons move in definite paths or levels around the nucleus?
An isotope is.....
What is an atom that has the same number of protons but a different number of neutrons?
Occurring at repeating regular intervals.
What is periodic?
A result of halogens reacting with metals.
What are salts?
A force responsible for same charged particles repelling and opposite charged particles attracting.
What is the electromagnetic force?
-All substances made of atoms, cant be created destroyed, divided
-Same element exactly alike, different elements are different
-atoms join with other atoms to make new substances
Name the 4 forces in an atom and what they do.
What is the gravitational force - pulls objects towards one another - affected by mass and distance
electromagnetic force - same charges repel, opposite charges attract
Strong force - holds the nucleus together
Weak force - neutrons turn into protons/electrons under certain circumstances in unstable atoms
Explain the periodic law.
What is the repeating chemical and physical properties change periodically with the atomic numbers of the elements?
Silicon is in this family of the periodic table.
What is the carbon group/Group 14.
The approximate amount of atoms in a penny. (Hint: the scientific notation is written as 2 x 1022)
What is 20,000,000,000,000,000,000,000 or 20 sextillion?