Definitions
The science of matter and its changes.
What is Chemistry?
The central part of an atom
What is the nucleus?
The name of the table that organizes elements.
What is the periodic table of elements?
Made of 2 or more atoms of the same elements or different elements bonded tightly together.
What are molecules?
The Russian chemist who arranged elements into groups with similar properties
Who is Dmitri Mendeleev
A substance of which objects are composed that occupies space and has mass.
What is matter?
Positively charged particles
What are protons?
The order in which the elements are organized
What is "by their atomic number"?
Combination of two or more substances that do NOT form a new substance
What is a mixture?
She discovered radioactive elements.
Who is Marie Curie?
The basic building blocks of all matter.
What are atoms?
Neutral particles
What are neutrons?
The 3 main groups in the periodic table
What are metals, non-metals, and metalloids?
Homogeneous mixture of two or more substances
What is a solution?
The laughing Greek Philosopher who claimed that all things were made of indivisible particles called "atoms"
Who is Democritus?
A pure substance made from a single type of atom.
What is an element?
Negatively charged particles
What are electrons?
Dailey Double: What are the electrons in the outermost shell called?
Two or more atoms have transferred or share their valence electrons.
What is bonding?
What types of reaction occurs when two substances react to form one new substance?
What is a synthesis reaction?
Father of Modern Chemistry
Who is Antoine Lavosier?
A pure substance made from two or more different elements chemically combined.
What is a compound?
What the atomic number tells us about an element
What is the number of protons in an atom?
Draw the Bohr model for an oxygen atom. Oxygen's atomic number is 8.
Drawing should have 8 protons and 8 neutrons in the nucleus, 2 electrons in the first shell, and 6 electrons in the outermost shell.
Reaction where a complex substance breaks down to form two separate substances.
What is decomposition?
Developed the representation for the atom.
Who is Niels Bohr?