Final Flashcards
What is Democritus credited with/
the idea that matter is made up of indivisible particles too small to see
what subatomic particle have no net charge?
neutrons
inside of an atom between the nucleus and an electron is
empty space
nearly all the mass of the atom is located in the
nucleus
an atom has 10 protons 12 neutrons, and 11 electrons. what is the approximate atomic mass?
22 amu
how many elements make up water?
2
what is the defining characteristic of an elements
its matter that can’t be made simpler
___must have definite ratio of different kinds of atoms inside of them?
compounds
the copper on the statue of liberty used to look much like a new penny. The changer that took place to make it green was a ____ change
chemical
A____ is the smallest unit of an compound.
molecule
the subatomic particles located in the nucleus of an atom are….
neutrons and protons
A ___ change takes place when you separate salt from salt water by boiling off the water.
physical
What subatomic particle have a mass of 1 amu?
neutrons and protons
According to curie, which could affect the rate at which radioactive atoms shot out high energy particles?
the amount of the sample
Which of the following compounds is ionic?
a. SO3 B. NaCL c. H2O d, none of these
B. NaCL
The name of the following compound K2S is
Dipotassium monosulfide
What is the right diagram for H2O?
..
H-O-H
..
The ____ bonds in water give hydrogen_____.
polar covalent/ positive charge
With the exception of hydrogen, when atoms bond they generally want ___electrons in their highest energy to become stable because they resemble____.
8/noble gasses
The name of the following compound CCL4 is:
Carbon tetrachloride
Valence electrons are electrons in the____.
outer most energy level
the way in which an atoms bonds with another atom is directly related to the number and location of the______.
electrons
In an ionic bond metals___.
give electrons to nonmetals
Covalent bonds result from the___ of electrons while ionic bonds result from the___ of electrons.
sharing/transfer
Which of the following elements is most likely to form a positive cation when bonding.
a. Flourine b. Chlorine c. Potassium d. Oxygen
c. Potassium
as the atomic radius increases electronegativity_____.
decreases
What is the correct diagram for a neutral aluminum atom as an LDD.
with 3 valence electrons around it
when a fluorine and chlorine atom bond they will form a____.
polar covalent bond
This element is in group 5, period 6
tantalum
what is true about alkaline earth metals.
they are all reactive, they are all metals, they form +2 ions
which of these elements is the most similar to calcium
a. barium b. bromine c. aluminum d. potassium
A. barium
the number of what subatomic particles determine what element you have?
protons
what is the symbol of the element with an atomic number .
Be
how many neutrons do all isotopes of carbon have?
impossible to figure out even with periodic table
most of the periodic table can be classified as
metals
what are the physical properties of Yttrium.
shiny, malleable, good conducter
a positive ion is called a
cation
the isotopes of the same element differ in
neutrons and mass number
bromine tends to form a__ ion with_____ electrons
-1,36
what did Lavoisier observe in his elements involving steel wool burning?
that burning steel wool in a closed container kept the total mass the same
what do neon and carbon have in common?
NOTHING
The most reactive nonmetals are in what group
group 17
1 cm3 is the same thing as
1 mL
a centimeter is approximately
the distance across your pinky nail
which of these is NOT a volume unit?
mL3
a cube measures 3 cm on each side. What is the area of one face of the cube?
9 cm2
a certain cube with a volume of 8cm3 has a mass 24 g. its density would be____ g/cm3
3
Would a 3 g/cm3 sink or float in water?
sink
a watt is a measurement for power in the metric system. Which of the following statements would be true?
a. 100 watts = 1 centiwatts b. 1 watt = 1000 milliwatts
c. 1 kilowatt = 10 watts d. none of the above
B. 1 watt = 1000 milliwatts
Copper has a density of about 9 g/cm3. What would the mass of 18 cm3 be?
162 g
How much time will it take a car traveling at 20 miles/hr to travel 100 miles?
5 hours.
1 chain is a unit of length equal 66 ft. If you were to convert 100 ft chains which of the following would be the correct conversion factor to multiply by?
a. 1 chain/66 ft b. 1 ft/66chain
c. 66 chain/1 ft d. 66 ft/1 chain
a. 1 chain/ 66 ft
A 1 liter bottle of water has_____ density compared to a 2 L bottle of water.
a. less b. more c. the same d. not enough information
c. the same
A cube measures 3 cm on each side. What is the volume of the cube?
27 cm3
the width of the classroom would best be estimated as
1000 centimeters
A joule is a measurement for energy in the metric system. Which of the following statements would be true?
a. 1000 J = 1 mJ b. 100 cJ = 1 J
c. 1 kj = 10000 J d. none of the above
100 cJ = 1 J
a certain cube with a volume of 24 cm3 has a mass of 8 g. It would______ in water which has a density of 1 g/mL
float
