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Chemistry 11 Atomic theory, structure, isotopes and electron configuration Flashcards | StudBud
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Chemistry 11 Atomic theory, structure, isotopes and electron configuration
Chemistry 11 Atomic theory, structure, isotopes and electron configuration
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1
Which of the following is the electron configuration for beryllium
1s22s2
1s12s3
2s2
1s32s1
2
What does the atom do when becomes a
cation
it shares electrons
it gains electrons
it loses electrons
nothing
3
Cathode rays are beam of
protons
electrons
alpha particles
neutrons
4
What is the atomic mass of helium?
four
one
two
six
5
Under Bohr's theory of line spectra, the energy in atoms is
continuous
zero
infinite
quantized
6
The number of protons in an atom is called the:
nucleus
mass number
atomic number
atomic mass
7
When an electron is excited, the electron's 'distance' from the nucleus
decreases
cannot be predicted
stays the same
increases
8
The proton has
the same charge and a smaller mass than the electron
the opposite charge and a smaller mass than the electron
the same charge and the same mass as the electron
the opposite charge and a larger mass than electron
9
"Electrons occupy the orbitals singly first than in pairs" is the
Pauli exclusion principle
Aufbau princple
Hund's rule
10
Electrons are filled in from the lowest possible energy level
Aufbau principle
Pauli exclusion principle
Hund's rule
11
In ground state, all the electrons in an atom are
in the lowest possible energy levels
in the highest possible energy levels
not moving
in the nucleus
12
The maximum number of electrons that may reside in the first energy level (n=1) is
eight
five
eighteen
two
13
Who was the person to propose the atomic theory based on line spectra?
Niels Bohr
Ernest Rutherford
Heisenberg
John Dalton
14
What is the electron configuration for N
1s22s22p4
1s22s12p4
1s22s22p3
1s22s32p3
15
Ions are
protons
charged atoms
electrons
neutrons
16
"Electrons in same orbital has opposite spins" is the
Pauli exclusion principle
Hund's rule
Aufbau principle
17
The atomic number is the same in different isotopes of the same element
True
False
18
Who was the first person to suggest that the atom was made up of
even smaller parts
John Dalton
J.J. Thomson
Democritus
Ernest Rutherford
19
The electron has a
positive charge and relatively large mass
positive charge and relatively small mass
negative charge and a relatively large mass
negative charge and relatively small mass
20
Isotopes are atoms of the same element with
different atomic numbers
different numbers of protons
different numbers of neutrons
different numbers of electrons
21
How many protons are in the helium atom?
four
two
five
one
22
Which one of the orbital is in higher energy level
3s
4s
3d
3p
23
Problem with Bohr's model was that
electrons are not accelerating and giving off energy
it is too compicated
electrons are in orbits
it did not fit for small atoms
24
Which of the following is a valid definition of mass number?
the number of protons and neutrons
the number of protons and electrons
the number of electrons in an atom
the number of protons in an atom
25
The neutron has
no charge and about the same size as an electron
no charge and about the same size as a proton
about the same size and charge as an electon
about the same size and charge as a proton
26
The existence of line spectra can be explained by
electrons jumping and falling to and from specific orbits
the unique colors of atoms
atoms crashing into prisms/spectroscopes
the unique properties of neon lights
27
Based on the gold foil experiment, what did Rutherford propose?
Atoms had a dense nucleus
Atoms are mostly empty space
All of the choices
The nucleus is positively charged
28
What are the four types of orbitals
s, p, b, e
s, p, d, g
s, p, b, f
s, p, d, f
29
Early quantum theory was based on the concept that
light behaves like both waves and particles
light behaves like particles rather than waves
light behaves like neighter waves nor particles
light behaves like waves rather than particles
30
Which part of Dalton's atomic theory was modified with the discovery of isotopes
atoms combine in whole number ratios
all matter is composed of atoms
Compounds are formed in chemical reactions
all atoms of a given element are identical
