(1) Please name and define the key properties of the three particles that compri
ID: 27015 • Letter: #
Question
(1) Please name and define the key properties of the three particles that comprise the atom including their charge, location in the atom, and mass (if present). (2) How is the atomic number of an element derived? What about the atomic weight (mass) of an element? (3) Please explain the relationship between atoms, molecules, and compounds. (4) What is the difference between covalent bonding and ionic bonding? (5) Discuss why it is that biological fluids tend to have a pH of around 7. What happens as you move down toward 0 from a pH of 7? What happens if you move up from 7?Explanation / Answer
2) Well, if you are talking about the number of protons, then look at the atomic number, which is the top number on the periodic table. The number of electrons will equal the number of protons in a neutral atom. The atomic mass is the number of protons plus neutons, so to find the number of neutrons, you can subtract the atomic number from the atomic mass. Now, if you are looking for the number of atoms of an element that make up a particular molecule then look at the subscripts (The little numbers beside the symbol) For example H2O which is water, is made up of 2 atoms of Hydrogen, and 1 atom of Oxygen) 3) Atoms is the basic unit, Atoms combine to form molecule , molecules unite to form a compound ( A thing that is composed of two or more separate elements; a mixture) 4) Covalent : A covalent bond is a chemical link between two atoms in which electrons are shared between them. Examples: There is a covalent bond between the oxygen and each hydrogen in a water molecule (H2O). Each of the covalent bonds contains two electrons - one from a hydrogen atom and one from the oxygen atom. Both atoms share the electrons. , Inonic Bonding Definition: An ionic bond is a chemical link between two atoms caused by the electrostatic force between oppositely-charged ions in an ionic compound. Examples: There is an ionic bond between the sodium and chloride ions in table salt, NaCl. 5) Because pH of blood is around 7 that is 7.45 which is neutral so fluids also have similar pH. 6) Acidity decreses 7) alkinlinity increases.
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