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CHEM 103 S2025 Final exam practice Flashcards | StudBud
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CHEM 103 S2025 Final exam practice
CHEM 103 S2025 Final exam practice
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Questions
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Answers
1
Two samples containing different types of compounds will always have the same mass
False
True
2
The most electronegative element is:
F
O
Ca
Xe
3
The probability map for an electron is called
A dove
An orbital
An orbit
A hobbit
4
What is chemistry?
The science that deals only with living creatures and their changes.
The science that deals with materials and their changes.
The science that deals with only with plants and their changes.
The Study of human society
5
What do all elements "want" to achieve?
a noble gas electron configuration
a noble gas gas bills
a noble gas smell
a halogen gas electron configuration
6
An acid-base (net ionic) reaction can be represented as the following:
True
False
7
Which wave has the longest wave length? (λ)
The red wave
The yellow wave
non of them has a λ since they are too short
The blue wave
8
In the metric system, we measure mass by kilo grams
True
False
9
Covalent bonds are formed when nuclei of two atoms _________ electrons
share
deny
rejects
transfer
10
The following equation is balanced:
False
True
11
Californium is a synthetic element, first synthesized in 1950 and named after the University and state of California.
True
False
12
According to Dalton's atomic theory
atoms of different elements differ
Atoms of the same element are identical
All answers are correct
all elements are made of particals called atoms
13
In the following equation, the molar ratio between O
2
and CO
2
is:
1:1
5:3
1:3
10:9
14
What is a mole?
a number: 6.022 X 1023 to be exact
a mass unit: 6.669 to be exaxt
a volume unit: 5.5 to be exact
a nickname for a good chemist
15
According to the Bohr Model of the Atom, all
electrons
are located in the nucleus
True
False
16
Arrhenius found that aqueous solutions that exhibit basic behavior contain:
hydrogen ions (H+)
sodium ions (Na+)
no ions
hydroxide ions (OH-)
17
The change described in the image is:
A Physical change
Both physical and chemical change
Neither physical nor chemical change
A chemical change
18
Which of the following is an element?
Oxygen O2
Water H2O
Air
Table salt NaCl
19
Give the formula for the compound that contain the following pair of ions:
MgCl2
Mg2Cl2
NaCl
MgCl
