Study Guide 1 bio

Most common atom found in living things(CHNOPS)

• Carbon

  Oxygen

• Nitrogen

  Phosphorus

• Sulfur

  Hydrogen

• Bromine

  aLUMINUM

valence eletrons

• inner shell

• middle shell

• outer most shell

• nucleus

aTOMIC MASS - PROTONS/ATOMIC NUMBER IS =NEUTRONS

SO WHAT IS (Se

p=34

atomic mass=78.971

79-34=45 neutrons

• wrong

• correct

How can an atom be neutral

• same number of neutrons and electrons

• different number of protons and electrons

• same number of protons and electrons

• it cant be

The essential elements of life Chno makes up what percent of living matter

• 50%

• 96%

• 80%

• 32%

the transfer of electrons (easier to separate)

• hydrogen bond

• covalent bond (strongest)

• Ionic bond

which are properties of water

• Oxygen is more electronegative

• water is nonpolar covalent

• water has high surface tension

• water is polar solvent

• high specific heat capacity

Isotopes have

• same number protons and different numbers neutrons

• same number of protons and same number of neutrons

• same number of protons and electrons

• number of electrons and different number of protons

the key difference between an ionic and covalent bond is that

• the lectronegativity is different from the other one

• one atom essentially donates an electron to another atom in an ionic bond

• has different molecule s interacting with eachother

• the amount of protons and lectrons are different

buffers are important because they resist sudden changes in the pH of body fluids of living organisms:

• no

• yes