Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
-
question 8 of 10 which group has different numbers of valence electrons…
C. Transition metals
-
wax melts when it is heated. which most likely describes what is true o…
The same amount of wax exists before and after the change.
-
multiple - choice question who performed the gold foil experiment? dalt…
B. Rutherford
-
question 7 of 10 how many valence electrons do the alkali metals have? …
D. 1
-
which statement best compares and contrasts two physical properties of …
Boiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a …
-
question 6 of 10 which of the following is a characteristic property of…
D. They are harder than alkali metals.
-
if there is 8 g of a substance before a physical change, how much will …
8 g
-
question 5 of 10 which group is in the leftmost column on the periodic …
D. Alkali metals
-
question 4 of 10 based on the number of valence electrons indicated by …
C. Francium (Fr)
-
question 3 of 10 how does an atom behave if it has a full octet of vale…
D. It is very stable.
-
question 2 of 10 where are the noble gases located on the periodic tabl…
D. The far right column
-
17 organic architecture focused on letting each building grow naturally…
B. form and function are one
-
question 1 of 10 which of the following is an alkaline earth metal? a. …
D. Magnesium (Mg)
-
question 10 of 10 how are the elements arranged in the modern periodic …
D. According to atomic number
-
question 9 of 10 which of an atoms electrons are involved in chemical r…
D. The electrons farthest from the nucleus of the atom
-
question 8 of 10 which elements occupy the same group in the periodic t…
A. Elements that share the same column
-
multiple - choice question who first came up with the concept of the at…
Democritus
-
question 7 of 10 why do all the elements in group 16 share similar prop…
A. They all have the same number of valence electrons.
-
question 6 of 10 how many valence electrons does b (boron) have? a. 5 b…
C. 3
-
question 5 of 10 what period is zn (zinc) in? a. 2a b. 30 c. 4 d. 12
C. 4
-
question 4 of 10 what do all the elements in one row of the periodic ta…
C. They all have the same number of core electrons
-
question 3 of 10 what arerepresentative elements? a. elements in the ta…
A. Elements in the tall columns of the periodic table
-
question 2 of 10 what is the periodic table? a. a table to record disco…
C. A tool to organize the elements
-
question 1 of 10 what group is f (fluorine) in? a. 2 b. 17 c. 7b d. 9
B. 17
-
what are the four quantum numbers for the electron circled in the diagr…
The four quantum numbers are \(n = 3\), \(l=2\), \(m_l=-2\), \(m_s =-\frac{1}{2}\)
-
which of the following is the correct order of filling the orbitals? a …
C. \(1s,2s,2p,3s\)
-
for ______, the 52nd electron must pair with one of the electrons in th…
d. Tellurium
-
which diagram describes how electrons fill the 3p orbital for sulfur?
E.
-
which of the following is the correct orbital diagram for fluorine?
A.
-
if the above quantum numbers describe two different electrons in an oxy…
\(0\)
-
question 7 1 pts br3sih is _______ due to br _______. not distorted, el…
distorted, lone pairs
-
a research student used a new software package to calibrate the electro…
Br because is is more electronegative
-
question 5 1 pts cf is ________ with a ________ towards f. nonpolar, el…
polar, dipole
-
question 4 1 pts a covalent bond with greater electron density around o…
polar covalent bond
-
question 3 1 pts the ability of an atom to attract toward itself (polar…
electronegativity.
-
a structure with two or more arrangements of electrons with the same at…
C. resonance structure.
-
the bond formed by the complete transfer of electrons from an electropo…
ionic bond.
-
question 3 which of these is an empirical formula? p₂o₅ p₄o₆ c₄h₁₀ c₂h₄
\(P_2O_5\)
-
calculate the percent composition of the elements in $mgso_4$ and $c_6h…
Carbon comprises approximately \(40.0\%\) of \(C_6H_{12}O_6\). Magnesium comprises approximately \(20.2\%\) of \(MgSO_4\). Sulfur comprises approximately \(26.6\%\) of \(MgSO_4\).…
-
what is the molar mass of mgo? 48.610 g/mol 40.304 g/mol 40.003 g/mol 4…
$40.304\ g/mol$ (the blue - colored option)
-
what is the molar mass of co2? 42.009 g/mol 40.009 g/mol 28.01 g/mol 44…
\(44.009\space g/mol\) (the option \(44.009\space g/mol\) is correct)
-
the haber process involves nitrogen gas combining with hydrogen gas to …
- hydrogen gas: The excess reactant - 17.04 grams: Molar mass of ammonia - 12.13 grams: Amount of ammonia produced - nitrogen gas: The limiting reactant
-
what is the molar mass of calcium? 24.022 g/mol 12.011 g/mol 40.078 g/m…
40.078 g/mol
-
an atom has the electron configuration of (1s^{2}2s^{2}2p^{5}). how man…
d. Nine
-
an atom has the electron configuration of $1s^{2}2s^{2}2p^{5}$. how man…
d. Nine
-
poetry and drama unit test let me not to the marriage of true minds adm…
B. abab
-
an diagram is the visual way to represent the arrangement of all the el…
electron - dot
-
2/10 is the above figure is correct? a yes b no
B. No
-
the omnivores dilemma chapter #3 homework 1. why did the u.s. governmen…
B. To dispose of surplus ammonium nitrate from weapons plants
-
homework assignment: substitution-elimination: discerning the differenc…
To solve this, we analyze each reaction based on the reagent, solvent, and substrate to determine if it's \( S_N2 \), \( S_N1 \), \( E2 \), or \( E1 \): ### Reaction 1: Substrate:…
-
babies born with fetal alcohol syndrome are proof that alcohol is a: ne…
- First question: teratogen - Second question: life; thanatos
-
7. na₂s → na + s
$\ce{Na_{2}S \to 2Na + S}$
-
6. ca + o₂ → cao
$2Ca + O_2 = 2CaO$ (Note: Using $=$ for the balanced equation, replacing $ ightarrow$ for clarity)
-
which of the following is a valid explanation as to why children are at…
B. Children's immune systems are not fully developed causing them to be at a higher risk.
-
no convincing evidence indicating benefits from antioxidant supplements…
A. True ### Question 2
-
question 9 which of the following is an example of chemistry? cooking d…
B. all of the options
-
question 8 which of the following is not a chemical reaction? synthesiz…
B. Cutting a piece of paper
-
question 7 what state of matter is ice? liquid plasma gas solid
D. Solid
-
question 6 what is a problem that chemistry can solve? creating the opt…
B. Creating new medicines, creating the optimal plant growth environment, and identifying a contaminant in water.
-
question 5 which option is an example of a chemical reaction? metal rus…
A. metal rusting
-
which option shows how chemistry is beneficial to our lives? scratching…
C. using batteries
-
question 3 chemical reactions are changing the way something smells. br…
C. changing two items into another item.
-
question 2 in a solid, how are the particles arranged? not moving at al…
D. very close together and patterned.
-
question 1 which of the following is something chemistry cannot tell us…
A. What someone is thinking
-
which statement best describes the effect of the free - verse form in \…
It helps the reader experience the poet’s thought process.
-
water & carbon worksheet instructions: answer the following questions. …
In liquid water, hydrogen bonds are transient (break/reform), so molecules are close. In ice, hydrogen bonds form a stable, open hexagonal lattice (each \(H_2O\) bonds to 4 others…
-
proteins are made up of chains of amino acids. amino acids have carboxy…
B. Carbon and oxygen
-
how is stained glass made? a. adding metallic oxides to sand and ash or…
A. adding metallic oxides to sand and ash or lime, then infusing at high temperatures
-
directions: read each scenario and decide if the main substance is a so…
1. G 2. S 3. L 4. L 5. S
-
quick lab purpose to use a graph to iden- tify period and group trends …
When an atom forms a cation, its size (ionic radius) decreases compared to its atomic radius. When an atom forms an anion, its size (ionic radius) increases compared to its atomic…
-
a review of chemical bonding poor, lonely atom. those of us here at che…
| Name (element) | Answers | Revisions | |--|--|--| | Attach a photo (Lewis dot diagram) | $\cdot \cdot \text{Ca}$ (two dots representing valence electrons) | | | Atomic Number | …
-
8. if an atom has 35 protons in the nucleus, how many electrons will it…
35
-
which pair have approximately the same mass? a a hydrogen, 1^h, and a d…
b. a proton and a neutron ### Second Question (How many protons, electrons, and neutrons in $^{27}\text{Al}^{3+}$?):
-
question 21 (1 point) number of neutrons in c^{14} is blank 1: question…
8 ### Question 22
-
how many of the following did dalton not discuss in his atomic theory? …
b. 5
-
question 18 (1 point) number of neutrons in sn 118 is blank 1 question …
68 ### Question 16 (most abundant element on Earth)
-
the number of protons in the nucleus of an atom is called its o a valen…
e. atomic number ### Second Question (Fill - in - the - Blank)
-
in chemistry, a formula is used to represent a all of these b an elemen…
a. all of these ### Second Question (Protons, Electrons, Neutrons in Elements)
-
4. give 4 quantum numbers for the following elements: a. cs n= l= m= m_…
(for Cs): \(n = 6\), \(l = 0\), \(m = 0\), \(m_s = +\frac{1}{2}\) (or \(m_s = -\frac{1}{2}\)) ### Part b: Iodine (I)
-
nicole has 2 glasses on the counter: one of water and one of sugar - wa…
Sugar - water is a mixture.
-
hydrogen symbol: no. of electrons: atomic number: atomic mass: p= n=
\( p = 1 \), \( n = 0 \)
-
julian accidentally dropped his science display and all the illustratio…
- The single black sphere: atom - The large structure with only black spheres (assuming same type): element - The structure with black and blue spheres: compound
-
hydrogen symbol: no. of electrons: atomic number: atomic mass:
Symbol: \(H\) No. of Electrons: \(1\) Atomic Number: \(1\) Atomic Mass: \(1.008\)
-
fill in a word that correctly completes the sentence. marina is camping…
chemical
-
martina is camping and needs wood for a cooking fire as well as for she…
B. a change in physical property
-
evan and his friends are working on a group project on matter. michelle…
D. Leon
-
chlorine symbol: no. of electrons: atomic number: atomic mass:
- Symbol: \( \text{Cl} \) - No. of Electrons: \( 17 \) (for a neutral atom, electrons = atomic number) - Atomic Number: \( 17 \) - Atomic Mass: \( 35.45 \) (approximate value from…
-
2. write the electron configuration for the following elements: a. p b.…
The electron configuration of P is \(1s^2 2s^2 2p^6 3s^2 3p^3\) ### Part b: Electron Configuration of In (Indium)
-
consider the percent abundance of the isotopes of element x. what is th…
Between 24 and 25
-
phosphorous symbol: no. of electrons: atomic number: atomic mass:
Symbol: \( P \) No. of Electrons: \( 15 \) Atomic Number: \( 15 \) Atomic Mass: \( 31 \)
-
potassium symbol: no. of electrons: atomic number: atomic mass:
Symbol: \(K\) No. of Electrons: \(19\) Atomic Number: \(19\) Atomic Mass: \(39.10\)
-
calculate the average atomic mass for the following situation. lithium …
6.9 (assuming the option is presented as, for example, B. 6.9 if that was the option label; based on calculation, the value is approximately 6.9) ### Question 18 (Chlorine Average…
-
oxygen symbol:_________________________ no. of electrons: ____________ …
Symbol: \(O\) No. of Electrons: \(8\) Atomic Number: \(8\) Atomic Mass: \(16\)
-
sodium symbol: no. of electrons: atomic number: atomic mass:
Symbol: Na No. of Electrons: 11 Atomic Number: 11 Atomic Mass: 22.99
-
13 what are the numbers of protons, neutrons, and electrons in the ion …
92 protons, 146 neutrons, 90 electrons (the last option with this combination) ### Question 14
-
nitrogen symbol:________________________ no. of electrons:____________ …
Symbol: \(N\) No. of Electrons: \(7\) Atomic Number: \(7\) Atomic Mass: \(14.01\)
-
which of the following pairs are atoms of the same element? a 5 protons…
A. Atom X: 5 protons, 3 neutrons; Atom Y: 5 protons, 4 neutrons ### Second Question (How many protons are in an atom represented by $\boldsymbol{_{90}^{232}Th}$?)
-
7 multiple choice 1 point a cation is an atom that has________. (think …
A. lost electrons ### Question 8
-
a cation is an atom that has______(think of how you make a cation) lost…
(Assuming the first option is "lost electrons") A. lost electrons (depending on the actual option labels, but the correct concept is losing electrons to form a cation) ### Questio…
-
5 what role did haudenosaunee women play in their government? a they we…
B. They chose and could remove sachems