Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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building atoms complete the table for the given element. then, build th…
Symbol/Abbreviation: \(B\) Atomic Number: \(5\) Atomic Mass: \(11\) # of Protons: \(5\) # of Neutrons: \(6\) # of Electrons: \(5\)
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the table below shows the total number of atoms in the reactants and th…
The paragraph can be completed as follows: "The table below shows the total number of atoms in the reactants and the products. Both the reactants and the products contain the same…
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complete the paragraph. both the reactants and the products contain the…
In a chemical reaction, the law of conservation of mass states that matter is neither created nor destroyed. This means that the total number of each type of atom in the reactants…
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what is a defining characteristic of dickinsons poetic style? unconvent…
unconventional use of punctuation and capitalization
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elements explain: a pure substance made of only one kind of atom exampl…
A molecule is two or more atoms bonded (same or different elements). A compound is a molecule with two or more different elements. All compounds are molecules, but not vice - vers…
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the conservation of matter can be demonstrated by using chemical equati…
\(I_2 + 5Cl_2+6H_2O ightarrow2HIO_3 + 10HCl\)
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choose the correct trend in metallic character. metallic character decr…
metallic character decreases as you move across a period from left to right and increases as you move down a group
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which of the following atoms has the least metallic character? na k li …
Li
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which of the following atoms is the largest? k na rb cs li
Cs
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which of the following elements has the lowest ionization energy? he f …
Rb
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which of the atoms represented below is the largest in size? as bi n sb…
Bi
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a neutral li atom has three electrons; an li ion is formed when a li at…
- Part D: \(1s^{\wedge}22s^{\wedge}22p^{\wedge}6\) - Part E: noble gases
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for each of the following, write the formula of the covalent compound: …
1. \(SbBr_{3}\) 2. \(IF_{5}\) 3. \(N_{2}O_{3}\) 4. \(PI_{3}\)
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in which of the following sets is the symbol of the element, the number…
In, 49 protons, 49 electrons.
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which of the following elements has the lowest electronegativity? lithi…
lithium
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p3- express your answer in complete form, in order of increasing orbita…
\(1s^{\wedge}22s^{\wedge}22p^{\wedge}63s^{\wedge}23p^{\wedge}6\)
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of the following elements, which one has the smallest first ionization …
aluminum
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f-express your answer in complete form, in order of increasing orbital.…
\(1s^{\wedge}22s^{\wedge}22p^{\wedge}6\)
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what is the charge of a cation? no charge a positive charge the charge …
B. a positive charge
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each period in the periodic table corresponds to a(n) ____. ○ principal…
principal energy level
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which of the following groupings contains only representative elements?…
Al, Mg, Li
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use the electron configuration of oxygen to explain why it tends to for…
The electron configuration of oxygen is \([He]2s^{2}2p^{4}\). By gaining two electrons to form the \(2 -\) ion, the electron configuration of the oxygen ion becomes the same as a …
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what is another name for the transition metals? group c elements group …
C. Group B elements
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horizontal row in the periodic table vertical column in the periodic ta…
1. period 2. group 3. periodic law 4. metal 5. transition metal 6. atomic radius 7. atomic mass 8. electrons 9. electronegativity 10. ionization energy
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atomic size generally remains constant within a period. decreases as yo…
decreases as you move from left to right across a period.
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what is another name for the representative elements? transition elemen…
C. Group A elements
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the modern periodic table is arranged in order of increasing atomic ___…
number
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in which of the following sets are the charges given correctly for all …
\(K^{+},Sr^{2 +},O^{2 -}\)
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what element in the second period has the largest atomic radius? lithiu…
lithium
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who arranged the elements according to atomic mass and used the arrange…
Dmitri Mendeleev
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in which of the following groups of ions are the charges all shown corr…
\(Ca^{2+}, Al^{3+}, Br^{-}\)
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which of the following statements is true about ions? ○ anions form whe…
Cations form when an atom loses electrons.
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what causes the shielding effect to remain constant across a period? el…
Electrons are added to the same principal energy level.
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what causes the shielding effect to remain constant across a period? el…
Electrons are added to the same principal energy level.
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to what category of elements does an element belong if it is a poor con…
nonmetals
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which of the following is true about the electron configurations of the…
The highest occupied \(s\) and \(p\) sublevels are partially filled.
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how does atomic radius change from left to right across a period in the…
It tends to decrease.
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what is the energy required to remove an electron from an atom in the g…
C. ionization energy
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which of the following elements has the smallest atomic radius? chlorin…
chlorine
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elements that are characterized by the filling of p orbitals are classi…
groups 3A through 8A
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what is the element with the highest electronegativity value?fluorinehe…
fluorine
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which of the following decreases with increasing atomic number in group…
Ionization energy.
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what is the maximum number of d orbitals in a principal energy level? 5…
5
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match each item with the correct statement below. region of high probab…
- region of high probability of finding an electron - atomic orbital - lowest energy level - ground state - tendency of electrons to enter orbitals of lowest energy first - aufbau…
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which of the following electron configurations of outer sublevels is th…
\(4d^55s^1\)
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what is the maximum number of orbitals in the p sublevel? 5 3 4 2
3
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how does the energy of an electron change when the electron moves close…
It decreases.
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the letter \p\ in the symbol 4p³ indicates the _____. ○ speed of an ele…
orbital shape
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stable electron configurations are likely to contain filled energy subl…
filled energy sublevels.
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which electron configuration of the 4f energy sublevel is the most stab…
\(4f^{14}\)
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the outermost s orbital of an atom contains two electrons. always true …
Sometimes true
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how many energy sublevels are in the second principal energy level? 3 4…
2
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what types of atomic orbitals are in the third principal energy level? …
s, p, and d only
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(1 point) osha, the occupational safety and health administration, has …
in compliance
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answer the following. (a) a certain solution has a hydrogen ion concent…
(a) \(4.48\times 10^{-4}\) moles per L; (b) \(6.4\times 10^{3}\) pounds
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13. which statement about the energy of a phase change is true? o melti…
Melting is an endothermic change, because ice absorbs energy from its surroundings as it melts.
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what is the maximum number of orbitals in the p sublevel?
3
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9. which diagram represents deposition? solid→gas liquid→gas gas→solid …
gas → solid
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what is the maximum number of d orbitals in a principal energy level?
\(5\)
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8. why can scientists ignore the forces of attraction between particles…
They are too weak to have an effect at the temperatures at which most gases exist.
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7. which property is constant in the combined gas law? number of partic…
number of particles
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what is the maximum number of d orbitals in a principal energy level? 2…
5
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6. what is true of all particles of gas enclosed within a container? th…
They move at different speeds.
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how does the energy of an electron change when the electron moves close…
It decreases.
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5. which state of matter has a definite volume but no definite shape? g…
liquid
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4. which equation represents the combined gas law? \\( \\frac { p _ { 1…
\(\frac{PV}{T}=\frac{PV}{T}\) (the third option)
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what is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p? 3d 3f…
4s
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what is the maximum number of electrons in the second principal energy …
8
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how does the energy of an electron change when the electron moves close…
It decreases.
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3. which statement correctly compares the motion of atoms in liquid mer…
Copper atoms vibrate around fixed positions, whereas mercury atoms move around while staying close together.
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9cw1 how many energy sublevels are in the second principal energy level…
2
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what is the maximum number of d orbitals in a principal energy level? 3…
5
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2. which phase change is endothermic? vaporization freezing condensatio…
vaporization
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what is the maximum number of orbitals in the p sublevel? 4 5 3 2
3
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what is the maximum number of electrons in the second principal energy …
8
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match each item with the correct statement below. region of high probab…
1. region of high probability of finding an electron - atomic orbital 2. lowest energy level - ground state 3. tendency of electrons to enter orbitals of lowest energy first - auf…
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9cw1 the outermost s orbital of an atom contains two electrons. always …
Sometimes true
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which of the following electron configurations of outer sublevels is th…
\(4d^{5}5s^{1}\)
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9cw1 which scientist developed the quantum mechanical model of the atom…
Erwin Schrödinger
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when an electron moves from a lower to a higher energy level, the elect…
absorbs a quantum of energy.
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stable electron configurations are likely to contain filled energy subl…
Filled energy sublevels.
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9cw1 how many energy sublevels are in the second principal energy level…
2
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match each item with the correct statement below. region of high probab…
- region of high probability of finding an electron: atomic orbital - lowest energy level: ground state - tendency of electrons to enter orbitals of lowest energy first: aufbau pr…
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which scientist developed the quantum mechanical model of the atom? alb…
Erwin Schrödinger
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9cw1 the letter p in the symbol ( 4 p ^ { 3 } ) indicates the ( \bigcir…
orbital shape
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what is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p? 2d 4s…
4s
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the outermost s orbital of an atom contains two electrons. always true …
Sometimes true
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9cw1 the letter \p\ in the symbol (4p^{3}) indicates the ( \bigcirc ) p…
orbital shape
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what types of atomic orbitals are in the third principal energy level? …
\(s,p,\text{ and }d\text{ only}\)
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when an electron moves from a lower to a higher energy level, the elect…
absorbs a quantum of energy.
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which electron configuration of the 4f energy sublevel is the most stab…
\(4f^{14}\)
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emission of light from an atom occurs when an electron falls into the n…
drops from a higher to a lower energy level.
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9cw1 stable electron configurations are likely to contain ○ filled ener…
filled energy sublevels.
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elements and compounds notes counting elements in a molecule: • count t…
- Count the number of **element symbols**. A **compound** will always have at least **two** elements. - Every element's symbol has one **capital letter**. - How many elements are …
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which of the following elements has the smallest atomic radius? chlorin…
chlorine
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what is the charge of a cation? a negative charge the charge depends on…
a positive charge
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2. neutralization • the salt is composed of the ______ from the base an…
# Brief Explanations: - In neutralization reactions, salts are formed from the[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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which of the following groupings contains only representative elements?…
Al, Mg, Li
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9cw2 which of the following is true about the electron configurations o…
The highest occupied \(s\) and \(p\) sublevels are partially filled.
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what is another name for the transition metals? group b elements noble …
Group B elements