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Science -- chemistry chapter 7
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What is the difference between exothermic and endothermic reactions
exothermic reactions release energy, while endothermic reactions absorb energy.
How many oxygen atoms are in 8H2O
8 oxygen atoms
How many Hydrogen atoms are in 2H2O
4 hydrogen atoms
What is the Chemical compound for hexadecamer of Surfactin
C₂₅H₄₆MgN₆O₁₆P₃S
What is ammonia's product in this chemical equation
NH3
Balance Ammonia's chemical equation
N2 + 3H2 ---> 2NH3
What are the reactants in Ammonia's chemical equation
N2 and H2
What do elements in the same group have in common?
Same number of valence electrons
What are some properties of metals
shiny, good conductors, malleable (can be hammered into thin sheets), and ductile (drawn into wires)
What are some properties of a non-metals
Poor conductors of heat and dull
Where are the metalloids organized on the periodic table
In a zigzag line on the right side of the periodic table
Where are the metals organized on the periodic table
The left side and of the metalloids
Where are the nonmetals on the periodic table
Right side of metalloids starting from column 14 all the way to 18
How are the elements arranged on the periodic table
Rows called periods and columns called groups organized by the amount of valence electrons and their atomic number
How many neutrons does gold have
118
How many protons are in a gold atom
79
What is the mass of a neutron particle
1AMU
What is the mass of a proton particle
1AMU
What is the mass of a electron particle
0AMU
Where are neutrons found
In the nucleus
Where are protons found
In the nucleus
Where are electrons found
Electron cloud
What charge does a proton have
Positive Charge
What charge does an electron have
negative charge
What charge does a neutron have
No charge
Where are valence electrons located
The outer ring of an atom
What particle(s) make up an atom
Neutrons, electrons, and protons
what is the chemical formula for Hydrogen Peroxide
H2O2
What is law of conservation of mass
This law states that matter cannot be created nor destroyed
When mixing two hydrogen atoms and one oxygen atom you create a singular water molecule. Is this a physical or chemical change.
Chemical
Is blowing bubble in chocolate milk physical or chemical change
Physcial
Is painting your bedroom walls physical or chemical change
physical
Is metal rusting physical or chemical
chemical
Is milk spoiling an example of physical change or chemical change
Chemical Change
What is a physical change?
change in the physical properties of a substance, as size or shape
What is a chemical change
chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the
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