How is it possible for 2 samples the hydrogen to contain the same variety of atoms, however have different weights?
Hydrogen has actually three isotopes: hydrogen-1, through a mass number of one, deuterium, through a mass number of two, and also tritium, with a mass variety of three. The more heavier sample have to contain a greater proportion of one or both that the heavier isotopes.

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A chemical bond is an attractive force acting in between two atom that may be strong enough to hold them together in a molecule or compound. The the strongest attractive forces an outcome from the gain, loss, or sharing of electrons. Instances of together chemical bonds room ionic bonds and covalent bonds. In contrast, the weaker hydrogen bonds occur between molecules or compounds.
Which kind of bond holds atom in a water molecule together? What attracts water molecules to every other?
The atom in a water molecule are hosted together by polar covalent bonds. Water molecules room attracted come one another by hydrogen bonds.
Both oxygen and neon room gases in ~ room temperature. Oxygen combines conveniently with other elements, however neon walk not. Why?
Atoms incorporate with each other to acquire a complete collection of electrons in their outer energy level or valence shell. Oxygen atoms do not have a complete outer power level, therefore they conveniently react with numerous other elements to achieve this steady arrangement. Neon currently has a full outer power level so it cannot integrate with various other elements.
Using chemistry notation, one ion is represented by a superscript add to or minus sign adhering to the symbol of one element. If an ext than one electron has been lost or gained, the electric charge ~ above the ion is represented by a number preceding the plus or minus sign.
Using the rules because that chemical notation. Write the molecular formula for glucose, a compound composed of 6 carbon atoms, 12 hydrogen atoms, and also 6 oxygen atoms.
The molecule formula for glucose, a compound composed of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms, is C6H12O6.
Three varieties of chemical reactions essential to the study of human physiology include decomposition reactions, synthetic reactions, and also exchange reactions. In a decomposition reaction, a chemistry reaction breaks a molecule into smaller fragments. A synthesis reaction assembles smaller molecules into larger ones. In one exchange reaction, components of the reacting molecules are shuffled about to produce new products.
In cells, glucose, a 6 carbon molecule, is converted right into two three-carbon molecules by a reaction that releases energy. What kind of reaction is this?
This reaction entails a huge molecule being broken down right into two smaller ones, so that is a decomposition reaction.
An enzyme is a protein the lowers the activation energy of a chemistry reaction, i beg your pardon is the lot of energy required to begin the reaction.
Without enzymes, chemical reactions would proceed only under conditions that the cells can not tolerate (e.g. High temperatures). Through lowering the activation energy, enzymes make it feasible for chemistry reactions to rapidly proceed under problems compatible because that life.
Organic compounds always contain carbon and hydrogen. Inorganic compounds do not save carbon and hydrogen atoms together structural components.
Specific chemistry properties the water that make life possible include: its solid polarity (enables it to be fantastic solvent), that reactivity (it participates in many chemical reactions), that is high warm capacity (it absorbs and also releases warmth slowly), and its ability to serve as a lubricant.
The pH is a measure up of the concentration that hydrogen ion in fluids. Acid and also base concentrations are measured in pH, which is the an unfavorable logarithm of hydrogen ion concentration, to express in moles per liter. Top top the pH scale, 7 represents a neutral solution; values listed below 7 suggest acidic solutions, and values over 7 suggest base (alkaline) solutions.
If the body is to maintain homeostasis and also thus health, the pH of different body fluids need to remain within a relatively narrow range.
An acid is a link whose dissociation in solution releases a hydrogen ion and also anion; a base is a link whose dissociation releases a hydrogen ion (OH-) or clears a hydrogen ion (H+) indigenous the solution; a salt is an inorganic compound consisting of a cation other than H+ and an anion other than OH-.
Stomach discomfort is frequently the an outcome of too much stomach mountain ("acid indigestion"). Antacids contain a weak base that neutralizes the excess acid.
Lipids space a varied group of compound that encompass fatty acids, eico-sanoids, glycerides, steroids, phospholipids, and glycolipids. They space organic compounds the contain carbon, hydrogen, and also oxygen in a ratio that does no approximate 1:2:1.
Human plasma membranes contain mainly phospholipids, plus tiny amounts the cholesterol and also glycolipids.
Proteins space organic compounds developed from amino acids that contain a central carbon atom, a hydrogen atom, an amino group (-NH2), a carboxyl group, (-COOH), and an R group or variable next chain. Proteins role in support, movement, transport, buffering, metabolic regulation, coordination and control, and defense.
The warm of boiling breaks bonds that keep the proteins tertiary structure, quaternary structure, or both. The resulting structural change, recognized as denaturation, influence the capacity of the protein molecule to perform it normal biological functions.
A nucleic mountain is a huge organic molecule made of carbon, hydrogen, oxygen, nitrogen, and phosphorous. Main point cells manage protein synthesis and make up the genetic material in cells.
A huge organic molecule do of the street ribose, nitrogenous bases, and also phosphate teams is which kind of nucleic acid?
Both DNA (deoxyribonucleic acid) and also RNA (ribonucleic acid) save on computer nitrogen bases and also phosphate groups, yet the nucleic acid explained is RNA since it contains the street ribose.

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Adenosine tree phosphate (ATP) is a high-energy link consisting of adenosine to which three phosphate teams are attached. The second and 3rd phosphate groups are every attached by a high-energy bond.
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