Subatomic Particle | Periodic Table | Matter and Energy : Definitions and observations | Chemical Reactions | Energy and Organisms |
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what is the opposite of an electrical charge of a proton?
The electrical charge of an Electron
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what group is located opposite of where metal is located?
Non-Metal
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2 or more atoms combined are refereed to as
Molecule
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What does a coefficient tell you?
# of molecules
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What organisms on the food web have the most available energy?
plants / producers
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What is located in the inside of the nucleus of an Atom, has a neutral electrical charge, and has a relative mass of 1 amu?
A Neutron
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How many groups or families of elements are on the table?
18
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2 or more different elements combined
Compound
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What does a subscript tell you?
# of atoms
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Which of the following elements is the least reactive metal?
A. K B. Ca C. Mn D. Zn
Zn
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where do you find the number of valence electrons of an element?
on the top of the element box
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they determine chemical properties and reactivity of an element
Valence Electrons
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change in properties – new substance formed
Chemical Change
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List at least 4 elements that make up most organic Molecules
carbon ,hydrogen, oxygen, phosphorus, nitrogen, or sulfur
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Which of the following is the better conductor?
A. Ge B. S C. Au D. C
Au
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What is located in the inside of the nucleus of an Atom, has a positive electrical charge, and has a relative mass of 1 amu?
A Proton
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What has shiny luster, good conductivity, and also has Malleability?
Metals
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combination of symbols and formulas that describe a chemical reaction
Chemical Equation
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answer the following in regard to this molecule :CaCO3
-how many atoms? -How many elements? -How many molecule? -is it a symbol or a formula?
5 atoms
1 molecule 3 elements a formula |
an object has a density of 15 g/ml and a volume of 20ml what is it's mass ?
300 g
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What is located Outside the nucleus of an Atom, has a negative electrical charge, and has a relative mass of 1/1836
An Electron
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Elements that have similar properties have the same ..............
Number of Valence Electrons
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List at least five indicators of a chemical Reaction
unexpected color change, precipitate forms, gas production (bubbles, fizzes), change in temperature, change in odor, change in properties
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Which of the following is not a physical change?
-Mouth -small intestine -Stomach -Esophagus
-Small intestine
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During cell respiration, sugar (C6H12O6) reacts to form carbon dioxide (CO2) and water (H2O). Which of the following best explains what happens during cell respiration?
A. Single atoms are formed into different elements. B. Atoms are rearranged into diffe
Atoms are rearranged into different compounds.
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