2.1 Introducing chemistry for biologists Flashcards
What is matter?
Anything that has mass and takes up space, its made of tiny particles called atoms
What are atoms made of?
Protons Neutrons and electrons
What is a Bohr diagram?
Are simple models that represent the arrangement of the subatomic particles in an atom.
Electrons are more stable when they are at a__________
lower energy which occurs when they are closer to the nucleus
What is a molecule?
The bonding between atoms results
Why is it called intramolecular>
Bonds occurring within the molecule
What are the three types of intramolecular?
Ionic bonds
Covalent bonds
Polar covalent bond
What is polar covalent bonds?
Is an unequal sharing of valence electrons between atoms in the pair
Why is it called dipole?
Because one end is slightly positive and the other is slightly negative
Which one becomes more negative in a dipole
The one that pulls hardest on the electron this is because atoms differ in their ability to attract electrons
What is electronegativity?
Is the measure of an atom’s ability to attract electrons in a chemical bond
What are three types of intermolecular bonds?
- London forces
- Dipole-dipole forces
- Hydrogen bonds
oWhat are londong forces?>
Holds non-poplar molecules together
Very weak
Momentary dipoles are created by the electrons contained withing the compound which are moving
What are dipole-dipole forces?
Holds polar molecules together
What are dipole-dipole forces?
Holds polar molecules together
Stronger than london
