WorksheetsChemistry I final exam
Total questions: 50
Worksheet time: 1hrs 6mins
Branch of chemistry that developes tools used to measure properties of matter
biochemistry
physical chemistry
analitical chemistry
organic chemistry
Study of the carbon and its compounds such as fuels, plastics and pharmaceuticals
organic chemistry
inorganic chemnistry
biochemistry
analitical chemistry
select the physical changes
digestion
honey cristalization
baking cookies
chop carrots
there are the properties that don't depend of the amount of matter
intensive
extensive
chemical
inherents
Type of matter with uniform and definite composition
pure substances
homogeneous mixtures
plasmas
heterogeneous mixture
Which is the correct form to clasify the following substances? (there are in order)
aluminum, sodium chloride (NaCl), vanilla ice cream, salad
molecules, mixtures
element, compound, homogeneous mixture, heterogeneous mixture
element, compound, heterogeneous mixture, homogeneous mixture
pure substances, mixtures
select the opcion with ONLY intensive properties
density, mass, melting point
viscosity, color, weight
melting point, boiling point, color
volume, size, mass
properties that describes the ability of a substace to combine with certain substance
physical
intensive
extensive
chemical
select the physical properties
copper is a conductor of electricity
Tin boils at 2270°C
tungsten doesn't react with oxygen
gold is very maleable
Select the chemical properties of chlorine
gas
toxic for living organisms
covalent molecule
highly reactive
Select the correct order
a) solid
b) liquid
c) gas
d) plasma
1. fixed volume and shape
2. over-heating gas, superconductor
3. molecules can flow
4. molecules move freely at high speeds.
a-1, b-3, c-4, d-2
d-4, c-3, a-1, b-2
b-1, c-3, d-4, a-2
a-1, b-3, c-2, d-4
select the option that describes correctly the following changes
a) ionization
b) sublimation
gas to plasma, gas to solid
gas to plasma, solid to gas
plasma to gas, solid to gas
plasma to gas, gas to solid
is the change from solid to liquid
solidification
melting
condensation
deposition
properties that describes the ability of a substace to combine with certain substance
physical
intensive
extensive
chemical
select the chemical changes
water boils
iron reacts with oxygen
an apple turns brown
a wire is bent
Choose the correct order:
1) Bohr
2) Thomson
3) Dalton
4) Rutherford
a) the atom is a solid sphere, indivisible and indestructible.
b) Atom is a positive changed sphere with negative charges inserted as raisins in a pudding.
c) Atomic model that presents the concept of a nucleus in the atom.
d) Atomic theory that presents the atom like a solar system.
1b, 2d, 3a, 4c
1d, 2b, 3a, 4c
1a, 2b, 3c, 4d
1c, 2b, 3a, 4d
How many neutrons does Calcium have?
(a)
How many electrons does Zr+4 have?
write just the number
(a)
Select the order of increasing ionization energy
Ca, Cr, Cu, As
S, Ge, Fe, K
K, Fe, Ge, S
Cu, Ag, Ni, Pd
Select the order of increasing electronegativity
Cs, Zr, Rh, Cl
Cl, Zr, Rh, Cs
Cs, Rh, Zr, Cl
Cl, Rh, Zr, Cs
Write the symbol of the following elements with the largest atomic radius:
[Ne]3s2, [Rn]7s2, or [Kr]5s2
(a)
Which of the following has the largest ionic radius? Li or Li+1
(a)
Which of the following has the largest ionic radius? As or As-3
(a)
How many protons does Hg+2 have?
(a)
Fe+3 is a/an
anion
cation
isotope
neutral element
Cu-65 is a/an
anion
cation
isotope
Chromium exists as four isotopes. Cr-50 is 4.35% abundant, Cr-52 is 83.79%, Cr-53 is 9.5% and Cr-54 is 2.36% abundant. Calculate the atomic mass of Chromium. Use four decimals.
(a)
The half-life of Zn-71 is 2.4 minutes. If a scientist has 100.0 g sample, how many grams would be remaining after 7.2 minutes?
Write JUST de number
(a)
After 24.0 days, 2.00 mg of an original 128.0 mg sample remain. What is the half-life of the sample?
Write just the number.
(a)
the correct form to write 3.61x10-4 in standar form is
(a)
the correct form to write 0.000007685 in scientific notation is:
7.685x10-6
76.85x10-3
7.685x106
7685x10-9
convert 87nm to cm
8.7x10-7
8.7x10-6
8700000
0.00087
The covid vaccine must be preserved at -70°C, express that temperature in °F
Don't write units.
(a)
Convert 135Km/h to m/s
(a)
surgical instruments must be sterilized at 172°C, express it in K.
Don´t write the units
(a)
If 13153 I has an alpha decay, the product would be?
12751 Sb
13154 Xe
13050 Sn
12949 In
288 94 Pu is the result of a beta decay, what element does it come from?
28893 Np
29496 Cm
28895 Am
28492 U
If 210 83Bi experiments a gamma decay, what would be the product?
21084 Po
20681 Tl
21082 Pb
210 83Bi
Which pair of elements has similar chemical and physical properties?
Cr and Mn
Al and In
Cu and Ti
B and Br
Which group do Nitrogen, Phosphorous and Antimony belong to?
chalcogens
halogens
noble gases
pnictogens
Whichgroup do magnesium, calcium and berillium belong to?
alkali metals
earth metals
outer transition metals
alkali earth metals
Families A are also called
main block elements
outer transition metals
inner transition metals
Write the spdf configuration for Pd.
separate the orbitals by commas without spaces between each one. (Example: 1s2,2s2, (a) )
Write the noble gas configuration for Sb.
separate the orbitals by commas, without spaces between each one. (Example: [10Ne],3s2,...)
(a)
Which element corresponds to the following electron configuration? [18Ar],4s2,3d5
write the symbol
(a)
Write spdf configuration for Sr
separate the orbitals by commas, without spaces between each one
(a)
Write the quantum numbers for the last electron of Ta
(a)
Write the quantum numbers for the last electron of Se
(a)
Identify the element (3,2,1,-1/2)
write the symbol
(a)
Write the symbol of the element with quantum numbers (3,1,-1,+1/2)
(a)
