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Basic Chem Concepts
Test Description: A bundle of random chem questions.
Instructions: Answer all questions to get your test result.
1) Compared to the charge and mass of a proton, an electron has...
A
an opposite charge and a smaller mass
B
the same charge and the same mass
C
an opposite charge and the same mass
D
the same charge and a smaller mass
2) A proton has approximately the same mass as
A
Beta Particle
B
Nuetron
C
Alpha Particle
D
Electron
3) When electrons in an atom in an excited state fall to lower energy levels, energy is
A
Released only
B
Both released and absorbed
C
none of these
D
Absorbed only
4) Which atom contains exactly 15 protons?
A
S-32
B
N-15
C
O-15
D
P-32
5) An ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of
A
6
B
8
C
11
D
5
6) What is the mass number of an atom which contains 28 protons, 28 electrons, and 34 neutrons?
A
62
B
56
C
90
D
28
7) Which element has the highest first ionization energy?
A
phospherous
B
calcium
C
aluminum
D
sodium
8) Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms'
A
atomic numbers
B
number of principal energy levels
C
number of valence electrons
D
atomic masses
9) An atom of which of the following elements has the greatest ability to attract electrons?
A
Sulfur
B
Nitrogen
C
Chlorine
D
Silicon
10) What are the columns of the periodic table called?
A
noble gases
B
Periods
C
Families
D
s, d, f, p
*select an answer for all questions
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