Basic Chem Concepts: Question Preview (ID: 16282)


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Compared to the charge and mass of a proton, an electron has...
a) the same charge and a smaller mass b) the same charge and the same mass c) an opposite charge and a smaller mass d) an opposite charge and the same mass
A proton has approximately the same mass as
a) Nuetron b) Alpha Particle c) Beta Particle d) Electron
When electrons in an atom in an excited state fall to lower energy levels, energy is
a) Released only b) Absorbed only c) Both released and absorbed d) none of these
Which atom contains exactly 15 protons?
a) P-32 b) S-32 c) O-15 d) N-15
An ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of
a) 5 b) 6 c) 8 d) 11
What is the mass number of an atom which contains 28 protons, 28 electrons, and 34 neutrons?
a) 28 b) 56 c) 62 d) 90
Which element has the highest first ionization energy?
a) sodium b) aluminum c) calcium d) phospherous
Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms'
a) number of principal energy levels b) number of valence electrons c) atomic numbers d) atomic masses
An atom of which of the following elements has the greatest ability to attract electrons?
a) Sulfur b) Nitrogen c) Chlorine d) Silicon
What are the columns of the periodic table called?
a) Periods b) Families c) noble gases d) s, d, f, p
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