Isotopes | Law of conservation of mass | Types of Chemical Reactions
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20 Terms
What determines the atom’s capability associated with chemical reactions?
Valence Electrons
What element can only have two valence electrons?
Helium
How many electrons can the first shell have?
2
How many electrons can the second shell have?
8
How many electrons can the third shell have?
18
How many electrons can the fourth shell have?
32
How many electrons can the fifth shell have?
50
What are various forms of an element?
Isotope
What best describes the isotope?
Same number of protons as the original atom
Different number of neutrons
resulting in different mass numbers
In an elemental notation (isotope and regular), the mass number is on the?
Top
In an elemental notation (isotope and regular), the atomic number is on the?
bottom
What is the conversion of one or more substances into a completely new substance?
Chemical Reaction
What represents the chemical reaction taking place?
Chemical equations
What states that mass is neither created nor destroyed?
Law of conservation of mass
What are the five chemical reactions we need to know?
Combination “Synthesis”
Decomposition “Desynthesis”
Single Displacement
Double Displacement
Combustion
What best describes Combination “Synthesis” reaction?
A + B = AB
What best describes Decomposition “Desynthesis” reaction?
AB = A + B
What best describes Single Displacement reaction?
A + BC → B + AC
1 element is replaced by another
What best describes Double Displacement reaction?
AB + CD → AD + CB
2 elements replace 2 other
What best describes a combustion reaction?
A substance reacts with oxygen gas releasing energy in the form of light and heat
must have O2 as one of the reactants