A
What is the maximum number of valence electrons an atom may have?
8
What is the pH for 1x10-3
3
How do you call the elements in the same column of the periodic table?
groups
True or False: Kinetic energy is related to the movement of the atoms.
True
How do you call a substance that produces hydroxide ions?
base
If there is an excess of H3O+ the solution will be acidic or basic?
acidic
What type of bond results from a sharing of 2, 4 and 6 electrons?
single, double and triple bond
What type of substance consists of two or more elements chemically combined?
compound
How do you call the elements in the same row of the periodic table?
periods
If a strip of blue litmus paper turns red when dipped into a solution, the pH must be ________ (number).
less than 7
Calculate the pH of a substance of HF 0.0067 M
2.17
Convert from scientific notation: 5.6x102
560
How many significant figures are here: 0.0034050
5
Which bond is characterized by sharing electrons between atoms?
Which bond is characterized by transferring electrons between atoms?
covalent, ionic
How do you call a substance that only loses one proton, two protons and multiple protons?
monoprotic, diprotic and polyprotic
Which geometry corresponds to two pairs of nonbonding electrons and two bonding electrons?
angular
acid
How do you identify an element? What is unique for each one of them?
protons
Which geometry corresponds to one pair of nonbonding electrons and three bonding electrons?
trigonal pyramidal
Which are the three subatomic particles, location and charge?
proton - positive - inside
neutron - neutral - inside
electron - negative - outside
Express in scientific notation: 0.00073
7.3 x 10-4
What is the name for the following compound: Na3S
trisodium sulfide
Calculate the pH of a substance of NaOH 0.0078M
11.9
Which geometry corresponds to a straight line?
linear
Convert the following 6.7mg to g
0.0067