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Chemistry Sem 1 Review Flashcards | StudBud
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Chemistry Sem 1 Review
Chemistry Sem 1 Review
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Review of chapter 4-9
Flashcards
40 cards
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Practice quiz
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Questions
40
Answers
1
What is the net charge of the ionic compound calcium fluoride?
1-
0
1+
2-
2
An ionic bond is a bond between
the ions of 2 different nonmetals
a cation and an anion
the ions of 2 different metals
valence electrons and cations
3
All atoms of the same element have the same ___.
mass numbers
number of protons
number of neutrons
mass
4
A compound composed of cations and anions is called
polar molecule
covalent molecule
ionic compound
diatomic molecule
5
To what category of elements does an element belong if it is a poor conductor?
metalloids
metals
nonmetals
transition elements
6
What is the representative unit in a molecular compound?
shared electrons
a molecule
an ion
a formula unit
7
What is the maximum number of d orbitals in a principle energy level?
1
2
3
5
8
The particles that are found in the nucleus of an atom are
protons and neutrons
electrons only
neutrons and electrons
protons and electrons
9
What are the Group 1A and 7A elements examples of?
representative elements
nonmetallic elements
transition elements
noble gases
10
In the Bohr model of the atom, an electron in an orbit has a fixed
color
position
energy
size
11
Which correctly shows a prefix used in naming covalent compounds with its corresponding number
hexa, -8
nona, -9
deca-, 7
octa, -4
12
What is the charge of a cation?
depends on size of nucleus
positive
no charge
negative
13
What does the number of 84 in the name krypton-84 represent?
atomic number
sum of protons and electrons
mass number
twice the number of protons
14
How many valence electrons are in a silicon atom?
6
2
4
8
15
The modern periodic table is arranged in order of increasing atomic
mass
charge
radius
number
16
Evidence about Dalton's atomic theory has shown that
atoms of an element aren't identical, but have the same mass
all of Dalton's hypotheses were correct
atoms are divisible
atoms of an element can have different numbers of protons
17
What is the energy required to remove an electron from an atom in the gaseous state?
ionization energy
nuclear energy
shielding energy
electronegative energy
18
Ionic compounds are normally in which physical state at room temperature?
gas
liquid
plasma
solid
19
What is the correct formula for potassium sulfite?
KHSO3
K2SO4
KHSO4
K2SO3
20
Each period in the periodic table corresponds to a/an
suborbital
orbital
energy sub level
principle energy level
21
What is the ending for the names of all binary compounds, both ionic and molecular?
-ate
-ide
-ade
-ite
22
Which of the following is the correct name for N
2
O
5
?
nitrogen dioxide
nitrate oxide
nitrous oxide
dinitrogen pentoxide
23
How does atomic radius change from top to bottom in a group in the periodic table?
it increases, then decreases
it tends to decrease
it tends to increase
it decreases, then increases
24
The smallest particle of an element that retains the properties of that element.
proton
electron
neutron
atom
25
Which subatomic particle determines the properties of an element
nucleus
neutron
electron
proton
26
Which of the following can form diatomic molecules held together by triple covalent bonds?
nitrogen
fluorine
oxygen
carbon
27
The sum of the protons and neutrons in an atom is called the
nucleus number
mass number
atomic mass
atomic number
28
What is the charge of the phosphide ion?
P2+
P2-
P3-
P3+
29
An -ate or -ite at the end of a compound name usually indicates the compound contains
a polyatomic ion
fewer e- than p+
only 2 elements
neutral molecules
30
Which of the following elements has the smallest atomic radius?
selenium
chlorine
bromine
sulfur
31
What unit is used to measure weighted average atomic mass?
amu
nanogram
angstrom
gram
32
Isotopes of the same element have different
numbers of neutrons
numbers of protons
atomic numbers
numbers of electrons
33
How many energy sub levels are in the 2nd principal energy level?
3
4
2
1
34
What is the element with the lowest electronegativity value?
fluorine
lithium
cesium
calcium
35
When an electron moves from a lower to a higher energy level, the electron
absorbs a quantum of energy
absorbs a continuously variable amount of energy
moves closer to the nucleus
always doubles its energy
36
According to the aufbau principle,
e- in same orbital must have opposite spins
e- enter orbitals of lowest energy first
e- enter orbitals of highest energy first
an orbital may be occupied by only 2 e-
37
What type of ions have names ending in -ide?
only metal ions
only gaseous ions
only anions
only cations
38
Which of the following elements has the smallest first ionization energy?
potassium
sodium
magnesium
calcium
39
What types of atomic orbitals are in the third energy level?
s, p, and d only
s and p only
p and d only
s, p, d, and f
40
Which of the following categories includes the majority of the elements?
metals
nonmetals
liquids
metalloids
