Chemstry - Study guides, Class notes & Summaries

Relative mass of a proton 1 . Relative mass of a neutron about the same as that of a proton Relative mass of an electron 1/1840 Relative charge of a proton +1 Relative charge of a neutron 0 Relative charge of an electron -1 Neutral atoms same number of positive protons as negative electrons Atomic (proton) number the number of protons in the nucleus of an atom

Pre-mRNA is the initial processing byproduct of mRNA transcription and is crucial for the expression of genes in mammalian cells, since the majority of protein-coding genes are broken by intermediate regions (introns) (Han et al., 2011). Part 1 The first and initial action in the pre-mRNA processing is the addition of an mRNA cap at the 5' end. Once the RNA's initial 20–30 nucleotides have been created, capping takes place. According to Cohen, 7- methylguanosine residue is added to the...

H - Hydrogen He - Helium Fe - Iron N - Nitrogen Na - Sodium F - Fluorine Li - Lithium C - Carbon CO2 - carbon dioxide O - Oxygen Mg - Magnesium

kinetic molecular theory - answers all matter is made of tiny particles that are constantly moving fundamental particle - answers take a macroscopic object and divide it repeatedly. Eventually you have a particle, which, if further divided is no longer the original substance. This smallest piece of the substance is called... h2o molecule - answers the fundamental particle of water is what? atom - answers the basic unit of a chemical element molecule - answers two or more atoms (same ...

HESI A2 CHEMISTRY QUESTIONS & ANSWERS 1)What is a neutralization reaction? - (ANSWER) a reaction in which an acid and a base react in an aqueous solution to produce a salt and water. 2. Out of the following, which is a molecular compound that ionizes in water: NaCl Cl2 HCl C6H6 - (ANSWER) HCl 3. Which of the following is an ionic compound that dissociates in water: NaCl Cl2 HCl C6H6 - (ANSWER) NaCl

Its a BTEC level 3 applied science unit 14 Applications of organic chemstry Making of designer chemicals unit 14: Applications of organic chemistry

Mixture A combination of two or more substances that are not chemically joined. Filtration Separates insoluble solids from liquids. Crystallisation The formation of crystals by cooling a saturated solution Simple distillation Used to separate a liquid from a solution

Relative mass of a proton 1 . Relative mass of a neutron about the same as that of a proton Relative mass of an electron 1/1840 Relative charge of a proton +1 Relative charge of a neutron 0 Relative charge of an electron -1 Neutral atoms same number of positive protons as negative electrons Atomic (proton) number the number of protons in the nucleus of an atom

H - Hydrogen He - Helium Fe - Iron N - Nitrogen Na - Sodium F - Fluorine Li - Lithium C - Carbon CO2 - carbon dioxide