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WorksheetsTest 2
Total questions: 19
Worksheet time: 10mins
Name
Class
Date
1.
1. which of the following is false?
a)
the proton has a charge of +1
b)
the electron has a relative mass of 1/1837 amu
c)
the proton has a relative mass of 1 amu
d)
the neutron has a charge of +1
2.
2. an atom containing 19 protons, 20 neutrons, and 19 electrons has a mass number of
a)
39
b)
19
c)
20
d)
58
3.
3. atoms of 38 Ca and 40 Ca differ with respect to number of
a)
neutrons
b)
orbitals
c)
protons
d)
electrons
4.
4. Two naturally occurring isotopes of an element have masses and abundance as follows: 54.00 amu(20.0%) and 56.00 amu(80%). what is the relative atomic mass of the element?
a)
54.20
b)
54.40
c)
54.80
d)
55.60
5.
5. the number of electrons in an atom of Mg-24 is
a)
12
b)
14
c)
24
d)
none of these
6.
6. the number of electrons a single d orbital can hold is
a)
10
b)
6
c)
2
d)
14
7.
7. the electron configuration of an atom is 1s22s22p63s23p64s23d5. which of the following is the element?
a)
Mn
b)
Cl
c)
Cr
d)
Ni
8.
8. the electron configuration of an atom is 1s22s22p63s23p6. The number of orbitals (cars) occupying electrons is
a)
9
b)
5
c)
11
d)
15
9.
11. members of oxygen's family on the periodic table have electron configurations which end with
a)
ns2np4
b)
ns2
c)
ns2p1
d)
ns2np2
10.
12. which experiment led to the notion that the atom contains mostly empty space?
a)
Milikan's oil drop experiment
b)
Rutherford's gold foil experiment
c)
Thomason's cathode ray tube experiment
d)
Dalton's atomic theory
11.
13. Ca-40, K-39, and Sc-41 all have the same
a)
number of neutrons
b)
atomic mass
c)
atomic number
d)
number of electrons
12.
14. the number of significant figures in 0.001040
a)
4
b)
7
c)
6
d)
3
13.
15. when multiplying 1.04 x 0.31 the number of significant figures in the answer should be
a)
2
b)
3
c)
4
d)
5
14.
16. the number of milligrams in 10.0 g is
a)
1.00 x 10 4
b)
100
c)
1.00 x 10-3
d)
1.00 x 103
15.
17. an empty graduated cylinder weighs 54.772 g. When filled with 50.0 ml of a liquid it weighs 97.701 g. The density of the liquid is
a)
0.859 g/ml
b)
1.95 g/ml
c)
1.10 g/ml
d)
0.910 g/ml
16.
18. Which of the following represents an element?
a)
N2
b)
CO
c)
NI
d)
PS2
17.
19. Neon is used regularly to make lights. When electricity is added to neon, the gas produces light. This happens because
a)
Electricity causes the electrons to jump from energy levels
b)
Electricity bounces off each atom
c)
electricity causes the atoms to move faster
d)
Electricity causes neutrons to be split into protons and electrons
18.
20. Which is a chemical property of chlorine?
a)
it combines with sodium to form sodium chloride
b)
it is a yellowish-green gas
c)
it boils at -34 0C
d)
it has a sharp odor
19.
21. On a sunny day, the metal lounge chair outside is a lot hotter than the wooden picnic bench because:
a)
the metal chair has a lower specific heat than the wood bench
b)
the wooden chair's molecules are moving slower than the chair's molecules
c)
the chair has more luster which helps absorb heat
d)
the metal chair has a higher specific heat than the wood bench
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