keywords
What is electron?
전자
_________ = anything that has mass and takes up space
matter
line spectrum = observing a ________ through a spectroscope
flame
______ = atoms with a charge
ion
What is 앙금 현성 in english?
precipitation
what is at the center of an atom?
nucleus
what is the SMALLEST unit of matter (물질)?
atom
___________ = different flame colors for different elements when placed in a flame
flame test
cation = _________ ____________
lose electrons
does a precipitation form:
a. solid
b. liquid
c. gas
d. none of the above (정답 없음)
a. solid
what is 분자식 in english?
molecular formula
what is the basoic component of matter that cant be broken down into simple substances?
element
calcium had a ________ flame color
orange
what has (+) charge and what has a (-) charge?
cation, anion
What is 탄산 칼슘 in english?
Calcium Carbonate
what is 양이온 and 음이온 in english?
cation, anion
atom = the SMALLEST unit of ________
matter
Which 2 elements had a green flame test?
copper, barium
In CaCl2 what is the cation? what is the anion?
cation = Ca2+
anion = Cl-
What color precipitation is AgCl and PbI2
white, yellow
what is made of 2 or more atoms?
분자
which elements make up water
Hydrogen, Oxygen
What 4 differences do we look at for line spectrum?
1. color
2. position
3. thickness
4. number of lines
only solutions with ions can conduct ___________
electricity
A precipitation = __________ solid
insoluble
translate this sentence: "원자 = 물질의 가장 작은 단위"
atom = the smallest unit of matter
What is 이산화 탄소 in English and what is the molecular formula?
carbon dioxide; CO2
Which 2 elements should we use line spectrum because they have the SAME flame color?
lithium, strontium
Hydrogen ion = ?
Chlorine ion = ?
ammonia ion = ?
example) magnesium ion = Mg 2+
Hydrogen = H +
chlorine = Cl -
ammonia = NH 4+
Sodium chloride (염화 나트륨) and potassium chloride (염화 칼륨) both have WHITE precipitations.
Which ion is in both solutions (용액)?
Cl-