Diatomic elements - Study guides, Class notes & Summaries
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CHEM 219 Module 1 Exam with Complete Solutions
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CHEM 219 Module 1 Exam with Complete 
Solutions 
organic chemistry the study of all chemicals containing carbon 
Catenation the process or preference of an element to bond with another atom of the 
same element 
Valence the number of bonds an atom will form to fill its outermost shell 
ionic bond Formed when one or more electrons are transferred from one atom to 
another 
covalent bond A chemical bond that involves sharing a pair of electrons between atoms 
in a molecule 
diatomic elements m...
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MCAT entrance exam all subjects combined questions & answers latest update
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m 
 
 
 
 
 
 
1.	Which of the following is the mRNA start codon in most cases? 
 
A.	UAA	B. AGU	C. AUG	D. UGA 
 
 
 
2.	Which of the types of RNA is the smallest? 
 
A.	mRNA	B. tRNA	C. rRNA	D. 
 
 
 
3.	Which of the following is not considered a pyrimidine? 
 
A.	C	B. T	C. U	D. G 
 
 
 
4.	Which of the following is paired correctly? 
 
A.	A-G	B. C-G	C. A-U	D. G-T 
 
 
 
5.	Which of the following characterizes a Western blot? 
 
A.	Antibody/protein hybridization	B. DNA/RNA combination	C. RNA ...
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CHEM 1020 Exam 1 Questions With 100% Correct Answers 2023
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CHEM 1020 Exam 1 Questions With 100% Correct Answers 2023 
matter 
any solid, liquid, gas, or plasma that occupies a space and has mass 
 
 
 
homogeneous mixture 
mixture that is uniform throughout (solution) 
 
 
 
heterogeneous mixture 
mixture that is not uniform throughout 
 
 
 
atoms 
smallest unit of an element 
 
 
 
element 
many atoms of the same type; most basic building blocks 
 
 
 
compounds 
different elements bonded together (pure substance) 
 
 
 
chemical symbols 
one or two l...
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Electrolysis Test Study Guide latest updated
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Electrolysis Test Study Guide latest updated 
What are the 8 uses of electrolysis? - ️️ Purification of metals 
Electroplating 
Chlorine production 
Extraction of Hydrogen from water 
Extraction of oxygen from water 
Extraction of Reactive metals 
Hair removal 
Production of sodium hydroxide 
What is Electrolysis? - ️️ The passing of an electric current through an molten ionic 
compound causing a chemical change resulting in a change in the elements that make 
up the compound. 
What is a...
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Electrolysis Test Study Guide 100% Accurate!!
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What are the 8 uses of electrolysis? - ANSWERPurification of metals 
Electroplating 
Chlorine production 
Extraction of Hydrogen from water 
Extraction of oxygen from water 
Extraction of Reactive metals 
Hair removal 
Production of sodium hydroxide 
 
What is Electrolysis? - ANSWERThe passing of an electric current through an molten ionic compound causing a chemical change resulting in a change in the elements that make up the compound. 
 
What is an Electrolyte? - ANSWERA molten ionic compound...
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Chemistry Final Exam (Answered)
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Chemistry Final Exam (Answered) 
 
Oxidation Rules 
Rule 1: The oxidation number of an element in its free state = 0 (Also true for diatomic elements) 
-Mg=0,H2=0, C=0 
 
Rule 2: The oxidation number of a monatomic (one-atom) ion is the same as the charge on the ion 
-Mg^2+=+2, Na^+=+1, O^2-=-2 
 
Rule 3: The sum of all oxidation numbers in a neutral compound is zero. The sum of all oxidation numbers in a polyatomic (many-atom) ion is equal to the charge on the ion. 
 
Rule 4: The oxidation numb...
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General Chemistry Placement Test, With Complete Solutions Updated | 20242024.
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General Chemistry Placement Test, With Complete Solutions Updated | 20242024. 
 
 
 
 
 
molecule	two nonmetal atoms combined form a covalent compound called a 
diatomic molecules	H2,O2,F2 
Matter	Anything that has mass and takes up space 
Element	A substance that cannot be broken down into simpler substances 
Compound	A pure substance made of two or more elements CHEMICALLY combined. 
Compound	Can be decomposed by chemically 
Mixture	A PHYSICAL blend of two or more components 
(aq)	aqueous mi...
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Portage Chemistry 219 with 100% correct answers
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The lone pairs in a LDD are equal to: 
The 2 dots 
 
 
 
The unpaired electrons are equal to: 
The 1 dot 
 
 
 
 
0:02 
/ 
0:30 
What is the number of bonds an atom can form, equal to? 
Their unpaired electrons 
 
 
 
Find the lone pair, the unpaired electrons and the bonds of Oxygen. 
2, 2, 2 
 
 
 
What is organic chemistry? 
The study of compounds that contain carbon 
 
 
 
What is catenation? 
The ability to form bonds between atoms of the same element. Carbon is very good at this. 
 
 
 
Wh...
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SAMPLE CHEMISTRY PLACEMENT EXAM QUESTIONS WITH COMPLETE SOLUTIONS 100% 2023/2024
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SAMPLE CHEMISTRY PLACEMENT EXAM QUESTIONS WITH COMPLETE SOLUTIONS 100% 2023/2024 
Answer: Oxygen 
Aluminum forms a +3 ion. In order for the formula unit Al₂X₃ to be electrically neutral, the element X must form a -2 ion. Nonmetals in the oxygen column do this. Of these elements, only oxygen is a diatomic gas. 
Aluminum reacts with element X to form a compound with the formula A₂X₃. Element X exists as diatomic molecules, X₂, in the gaseous state at normal temperature and pressure. Elem...
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SCSU CHE120 Final Exam Questions And Answers
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Celsius to Fahrenheit - (1.8 x °C) + 32 
Celsius to Kelvin - °C + 273.15 
Chemical property - Address the reactivity of the chemical ex: iron rusting, reactions with acids 
Dalton's Atomic Theory - 1. Matter is made up of atoms 
2. All atoms of the same pure element have the same mass 
3. Atoms of different elements have different masses 
4. When elements combine to form compounds, they do so in whole number ratios of the atoms 
5. Atoms do not change in a chemical reaction 
Density - Mass/vo...
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