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What is the science of atoms and how they combine to form molecules Chemistry
What is chemistry? The science of atoms and how they combine to form molecules
A change in the way atoms are bonded together is called... A Chemical Reaction
What is a chemical reaction A change in the way atoms are bonded together
What taught chemists how to separate mixtures from pure substances and how to weigh and measure the products of chemical reactions? Experiments
What are the four main areas of Chemistry? Analytical, Synthetic, Physical,& Biochemistry
What are the smallest chemical units of matter? Atoms
What is the center of the atom? Atomic Nucleus
Atoms are made up of 3 smaller particles: Protons, Neutrons,& Electrons
What property makes matter resist being moved? Mass
Matter is... Anything that occupies space and has mass.
Anything that occupies space and has mass is... Matter
Several smaller clouds that make up the electron could are called.... Orbitals.
Electrons occupy the space surrounding the nucleus, this is called... The Electron Cloud.
Each proton and neutron has a mass of... 1 amu
what does AMU stand for? Atomic Mass Unit
To calculate amu's.... You add the number of protons and neutrons
The number of protons will always equal the number of electrons. True of False? True.
Matter is classified into 2 categories: Mixtures and Pure Substances
Pure Substances are either: Compounds or Elements
Pure Substances are made of only: 1 kind of atom Ex. gold, copper, oxygen.
How many elements are found naturally? 92
How many elements have been synthesized artificially? 12
The Periodic Table of Elements lists all the_____ and gives properties like: Elements. The number of protons, atomic weight, and chemical symbol.
The periodic Table organizes the elements into... Families (according to chemical properties)
Substances that contain more than 1 element but are composed of 1 type of molecule are called: Compounds.
A compound is... Two or more atoms bonded together in a FIXED ratio.
Mixtures are Fixed, yes or no? Mixtures are NOT fixed.
The periodic table is organized in 3 ways: 1)The elements increase in atomic number from left to right across the rows. 2) Each element is identified by the number of protons alone. 3) Elements with similar chemical properties are lined up in the same column.
The number of protons is also called... Atomic Number.
Atomic Mass is also... Weight
How do you count atoms? By weighing them.
When you count atoms in big groups, its called: Moles.
The mole formula is: Moles= Weight in grams/atomic mass in amu
Created by: burdeshawgirl