Diatomic elements - Study guides, Class notes & Summaries

What is a chemical formula? - Answer a combination of symbols of the various elements that make up the compound Define Molar Mass - Answer The sum of atomic masses, based on chemical formula What are the units of Molar Mass (MM) - Answer Grams/Mole (g/mol) Number of moles can be found by - Answer a. Atoms of an element b. Molecules of a molecular compound One Mole equals ? - Answer Avogardo's number = 6.022 x 10^23 atoms/molecules How do you calculate molecules and ...

Alek’s latest update with complete and verified solutions electron (symbol, charge, mass, location) e-, -1, .000549 amu or 1/1800 amu, orbiting around nucleus proton (symbol, charge, mass, location) p+, +1, 1.0 amu, nucleus Neutron (symbol, charge, mass) N0, 0, 1.0 amu ecide which element probably has a density most and least similar to the density of rubidium. options are fluorine, cesium, thallium, & indium. Metals are more similar to each other than they are to nonmetals. Likewise, nonm...

CHAPTERS 7-8 QUESTION AND ANSWER 2024 GRADED A+ UPGRAD Why do atoms bond? ANSWER = To become more stable. To reach lowest energy state they can An atom becomes more stable by bonding with another atom if the resulting electron configuration is more like that of what group of elements? ANSWER = Noble gases Chemical bonds between atoms involve the rearrangement of *blank* to maximise stability ANSWER = Valence electrons Type of bond that forms between 2 or more atoms that have high elect...

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...

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...

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...

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...

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...

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...

Praxis 5442 - Physical Science Exam Study Guide. Potential energy - answerEnergy that is stored and held in readiness 3rd law of thermodynamics - answerthe law that states that in order for motion to stop we have to reach absolute zero critical point - answera point on a phase diagram at which both the liquid and gas phases of a substance have the same density, and are therefore indistinguishable. chemical energy - answerA form of potential energy that is stored in chemical bonds & inter...