Chemistry 101
Chemistry is the study of
a. motion and forces
b. atoms and molecules
c. living things
d. stars and planets
b. atoms and molecules
Which of these is the smallest?
Deka
Centi
Kilo
Milli
Milli
Which layer is most dense?
A. floating at the top
B. floating in the middle
C. floating near the bottom
A. floating at the top
Which particle lies outside the nucleus in the orbitals?
Electrons
If an atom has a charge, it is an:
a. isotope
b. ion
b. ion
Anything that has mass and takes up space is called…
solid
liquid
matter
compound
matter
Convert 32.0 m to kilometers
0.032 km
How does the density of a small piece of aluminum compare to a big chunk of aluminum?
The number of protons in an atom is given by the
a. mass #
b. group #
c. ion charge
d. atomic #
d. atomic #
What type of bond utilizes the complete transfer of electrons?
ionic
When lighting a Bunsen burner, what is done first?
Light the match.
Convert 0.0220 g to milligrams.
22 mg
What is the formula for density?
D = M/V
How many neutrons does Iron (Fe) have?
56 (mass)
-26 (protons)
=30 neutrons
Stealing or sharing of electrons depends on the comparative _________ the atoms have.
electronegativities
This is the physical property we use the unit "grams" to measure.
Mass
What is the fundamental unit of volume in the metric system?
Liter (L)
What is the density of a cube with a volume of 3 mL and a mass of 75 g?
25 g/mL
An element has 7 protons and 7 neutrons.
What element is it?
and
What is the atomic mass?
An element with 7 protons is Nitrogen, and with 7 neutrons, its atomic mass would be 14 (7 protons + 7 neutrons = 14).
An atom has 5 protons and 5 electrons. What is the charge of the atom?
0 - Neutral
Which group on the periodic table has the least reactive elements?
Nobel Gases
Which of the following is equivalent to 16.0 km?
A. 16,000 Dm
B. 0.016 mm
C. 16,000 m
D. 16 cm
C. 16,000 m
On a density graph, metal B has a slope that is less steep than the slope of metal A
How does a 10.0 gram sample of Metal B differ from a 10.0 gram sample of Metal A?
Metal A has more mass than Metal B
Metal B has more mass than Metal A
Metal A has more volume than Metal B
Metal B has more volume than Metal A
Metal B has more volume than Metal A
What did Dmitri Mendeleev do?
Dmitri Mendeleev is most recognized for developing the periodic table of elements
Nonmetal atoms tend to _______ electrons and form ________ ions.
Nonmetal atoms tend to GAIN electrons and form NEGATIVE ions.