Midterm Exam Flashcards
What occupies most of the volume of an atom?
Electron
Anion
Number of protons is less than number of electrons Has one or more extra electrons Net charge is negative
What is the number at the top right of an element
Net charge
Milli
10^-3
What is the symbol for effective nuclear charge?
Zeff
What is the approximate mass of a neutron?
1 amu
What is the approximate mass of an electron?
0 amu
Force is inversely proportional to what?
The square of the distance
How many electrons can the k shell hold?
2
What is the formula for density?
D=m/v
What is the formula for speed?
S=d/t
What has/ have a mass of about 1 amu?
Proton and neutron
Mass number
The total number of protons and neutrons in the nucleus The approximate mass of the atom-the actual mass is slightly lower
Cation
The number of protons is more than the number of electrons Is missing one or more electrons Net charge is positive
What is the number of at the top left of an element
Mass number
Ionic
Metals and non metals, strong
Isotopes
Atoms of the same element with different mass number Have the same number of protons, different numbers of neutrons
Nano
10^-9
Atomic number
The number of protons in the nucleus The total positive charge in the nucleus Which element
Outermost electrons
Valence
What do like charges do?
Repel
Force is directly proportional to what?
The magnitudes of the charges
How many electrons can the L shell hold?
Up to 8
Micro
10^-6
Mega
10^6
What is the approximate mass of a proton?
1 amu
What is atomic weight
Sum of the weights of all the isotopes each multiplied by its percent abundance
What occupies most of the mass of an atom?
Proton
What happens to electrons as you right to left and down the periodic table?
Decreases
What has a -1 charge?
Electron
Covalent
Two non metals, weak
Natural abundance
The percentage of atoms of each isotope
Net charge
The number of protons minus the number of electrons
What do opposite charges do?
Attract
Centi
10^-2
What does the attraction for electrons do as you go across the periodic table left to right and up
Increases
What has a charge of zero?
Neutron
Kilo
10^3
What is the charge of a +1?
Proton
