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Science Units 1-9
Terms in this set (12)
What is an atom, and what particles make up an atom?
An atom is the fundamental unit of matter, and it is made up of protons, neutrons, and electrons.
What is an element?
An element is a chemical substance made up of one kind of atom.
What is the atomic number and the atomic weight of an element?
The atomic number of an element is the number of protons in the nucleus of an atom of that element. The atomic weight of an element is approximately equal to the sum of the number of protons and neutrons in the nucleus of an atom of that element.
What are some kinds of chemical reactions?
Combination, Decomposition, Displacement, and exchange
What is one way to classify a chemical reaction?
Endothermic versus Exothermic.
What are some differences between acids and bases?
Acids can donate protons, are sour, are not slippery, and have pH less than 7. Bases can accept protons, are bitter, are slippery, and have a pH greater than 7.
What is a neutralization reaction?
When equal amounts of acid and base completely neutralize each other
What are two types of mixtures?
Homogenous and Heterogenous
What are some ways to separate mixtures?
Filtration, Evaporation, Chromatography.
What are the four main states of matter?
Solid, Liquid, Gas, Plasma.
What are four types of carbohydrates?
Monosaccharides, disaccharides, oligosaccharides, and polysaccharides
What are polymers?
Polymers are long chain molecules made of many repeating units.
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