Periodic Table
Who organized the periodic table?
Dimitri Mendeleev
What is the atomic symbol of aluminum?
Al
What are atomic numbers?
The number of protons in the nucleus of an atom.
What does the Democitus model look like?
Tiny, solid particles that could not be divided.
Atomic symbol of chlorine
Cl
How did Dimitri Mendeleev organize the periodic table?
He grouped them up based on their atomic mass and similar physical and chemical properties.
What is the atomic symbol of gold.
Au
How is a carbon atom different from a nitrogen atom?
They have different numbers of protons.
What does the Thomson model look like?
Spherical atom containing small, negatively charged particles.
Atomic symbol of Mercury
Hg
What are periods? What are they numbered?
The horizontal rows of elements on the periodic table. 1-7
What is the atomic symbol of Iron?
Fe
In an atom, the number of ______ always matches the number of ______.
electrons, protons.
What does the Rutherford model look like?
Positively charged nucleus surrounded by electrons
From the Democritus, Thomson, Rutherford, and Bohr model, which atomic model is closest to the one we use now?
The Rutherford Model
What are groups? What are they numbered?
The vertical columns in the periodic table. 1-18
What is the atomic symbol of potassium?
K
how many protons does carbon have?
6
What does the Bohr model look like?
Electrons are in fixed orbits around the nucleus.
What is a Lewis dot structure?
A chemical symbol of an element surrounded by dots to represent the number of electrons in the outermost energy level
What is another name for groups?
Families.
What is the atomic symbol of Sodium?
Na
how many protons does Mercury have?
80
What model do we use now?
The electron cloud model.
How to calculate the mass number of atoms
Mass number= number of protons + number of neutrons