HONORS PHYSICAL SCIENCE FINAL EXAM
what's a ionic bond?
(nonmetal and metal) when atoms transfer electrons to become stable.
what's a covalent bonds?
(nonmetal and nonmetal) bond between them that share electrons.
how do you write covalent bonds?
1. write the first element, with the -ide suffix on the end and the # prefix at the beginning 2. write the second element, with the -ide suffix and the # prefix at the begging
how do you write ionic bonds?
1. write the name of the cation(the metal) 2. write the name of the anion(the nonmetal)
decca
10
what's 1.01x10^5
101,000
di
2
(dimensional analysis)how many seconds in one day?
24hr/1day 60min/1hr 60s/1min = s/day=86400 s/day
tri
3
tetra
4
penta
5
what's 50,500 in scientific notation?
5.05x10^4
hexa
6
hepta
7
octa
8
hona
9
whats a physical change?
Appearance or form of the matter changes but the kind of matter in the substance does not.
density formula?
Density = mass/volume (d=m/v)
whats the difference between qualitative and quantitative?
Quantitative data tells us how many, how much, or how often in calculations. Qualitative data can help us to understand why, how, or what happened behind certain behaviors
How do you convert a number to scientific notation?
a number with a decimal point after the first digit x 10^how every many decimal points are moved
pH scale
anything below 7 is acidic, anything above 7 is alkaline
whats a chemical change?
he kind of matter changes and at least one new substance with new properties is formed.
whats newtons second law of motion?
the acceleration of an object is directly related to the net force and inversely related to its mass
whats the law of conservation of mass?
the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.
how can you tell if a chemical equation is balanced or not ?
there must be the same mass of atoms on both sides of a chemical equation, and therefore the same number of atoms.
whats a decomposition reaction?
when a compound breaks down into two or more simpler substances.
what's bonding?
when atoms gain, loose, or share electrons and form chemical bonds.
whats a single-replacement reaction?
when one element replaces a similar element in the compound.
whats a double-replacement reaction?
when the positive and negative ions of two ion compounds change places to form two new compounds.
what's a combination reaction (also can be known as synthesis reaction)?
when two or more substances combine to form a single new substance.
