Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
-
which element does this model most likely represent? *
carbon
-
what would the atomic number be for the element shown in the model: *
6
-
the unit of mass used for atoms: * moa - mass of atom uam - unit of ato…
- First question: amu - atomic mass unit - Second question: most of the mass of the atom is in the nucleus - Third question: The mass of an electron is so small that we don't coun…
-
which of the following is true when comparing protons and electrons: * …
protons have a positive charge and electrons have a negative charge
-
which of the following is true when discussing the structure of the ato…
The nucleus is very small and tightly/densely packed with protons and neutrons.
-
which of the following is true when comparing protons and electrons? o …
- First question: protons have a positive charge and electrons have a negative charge. - Second question: protons and neutrons. - Third question: The nucleus is very small and tig…
-
write the chemical formula namechemical formula nickel (iii) iodide cop…
Copper (II) sulfide: \(CuS\) Vanadium (IV) chloride: \(VCl_{4}\) Vanadium (V) chloride: \(VCl_{5}\) Gold (III) oxide: \(Au_{2}O_{3}\) Tin (IV) oxide: \(SnO_{2}\)
-
15. what is \secondhand aerosol\ from vaping? a) clean air b) smoke tha…
15. C. Aerosol that others nearby can inhale, containing harmful chemicals 16. B. It can slow reaction time and impair judgment 17. B. Teen brains are still developing and more se…
-
5. the teenage brain continues developing until about what age? a) 15 b…
5. C. 25 6. B. Hippocampus 7. C. Memory problems and decreased academic performance 8. B. Heavy metals, nicotine, and cancer - causing chemicals 9. B. A type of lung damage caused…
-
write the formula of each polyatomic ionic compound shown below: click …
| Name | Chemical Formula | |--|--| | Ammonium cyanide | \(NH_4CN\) | | Strontium chlorate | \(Sr(ClO_3)_2\) | | Lithium phosphite | \(Li_3PO_3\) | | Aluminum carbonate | \(Al_2(C…
-
quiz: the dangers of marijuana and vaping for teenagers 1. what is the …
1. B. THC 2. C. Impaired coordination and judgment 3. B. Flavored oils and nicotine 4. A. They can cause addiction and harm brain development
-
question 1 (5 points) an acid will have a ph < 7. o a) true o b) false …
- Question 1: a) True - Question 2: b) False - Question 3: b) False
-
highlight and name the polyatomic ion in each ionic compound shown belo…
| Chemical Formula | Polyatomic Ion Name | | ---- | ---- | | \(K_{3}PO_{4}\) | phosphate | | \(Ca(NO_{3})_{2}\) | nitrate | | \(Al_{2}(SO_{4})_{3}\) | sulfate | | \(Na_{2}CO_{3}\)…
-
name the simple ionic compounds shown below: cl chemical formula licl m…
| Chemical Formula | Name | | --- | --- | | \(Na_2S\) | Sodium Sulfide | | \(MgF_2\) | Magnesium Fluoride | | \(Ba_3N_2\) | Barium Nitride | | \(Al_2O_3\) | Aluminum Oxide | | \(M…
-
write the formula for each simple ionic compound shown below: name rubi…
| Name | Chemical Formula | |--|--| | Rubidium sulfide | $\text{Rb}_2\text{S}$ | | Sodium bromide | $\text{NaBr}$ | | Beryllium fluoride | $\text{BeF}_2$ | | Lithium sulfide | $\t…
-
using your periodic table and your notes from today, decide if the foll…
- Li: donate 1 electron - Br: gain 1 electron - K: donate 1 electron - S: gain 2 electrons - Mg: donate 2 electrons - Cl: gain 1 electron - Ca: donate 2 electrons - I: gain 1 elec…
-
question which statement best describes an ionic bond? a an ionic bond …
A. An ionic bond involves a metal that transfers one or more electrons to a nonmetal
-
question which of the following formulas represents an ionic compound? …
D. \(Ca(OH)_2\)
-
question these two elements, shown in the picture below, form an ionic …
C) \(X_{2}Y\)
-
question true or false 1) the physical properties of ionic compounds ar…
1. True 2. False
-
type in the maximum number of electrons that can be present in each she…
\(n = 5\) shell: \(50\) \(n = 2\) shell: \(8\) \(n = 2,l = 0\) subshell: \(2\) \(n = 2,l = 1\) subshell: \(6\) \(3d\) subshell: \(10\) \(2s\) subshell: \(2\) \(5f\) subshell: \(14…
-
match each set of quantum numbers to the correct subshell description b…
\(2p:4\), \(3d:2\), \(2s:1\), \(4f:5\), \(1s:3\)
-
which of the following sets of quantum numbers describe valid orbitals?…
\(\boldsymbol{n = 1,l = 0,m = 0}\), \(\boldsymbol{n = 3,l = 0,m = 0}\), \(\boldsymbol{n = 5,l = 4,m=-3}\)
-
for the n = 3 electron shell, which of the following quantum numbers ar…
\( l = 0\), \(m=-2\), \(m = 2\)
-
ations and the periodic table to answer the questions: 1s²2s²2p⁶3s²3p⁶4…
B. bromine (Br)
-
table to answer the questions: rect electron configuration for 2d1 3s1 …
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{2}\)
-
use the periodic table to answer the questions: which is the correct el…
\(1s^{2}2s^{2}2p^{6}3s^{1}\) (the second option)
-
consider the orbitals shown below. which of these diagrams correctly sh…
The diagram with \(3s\) filled (\(\uparrow\downarrow\)) and three \(3p\) orbitals each with one electron (\(\uparrow\), \(\uparrow\), \(\uparrow\)) is correct.
-
which type of chemical reaction is represented above? h₂so₄(aq) + koh(a…
Neutralization
-
h₂so₄(aq) + koh(aq) → k₂so₄(aq) which type of chemical reaction is repr…
Neutralization
-
which of the following is a combustion reaction? c7h16(l) + 11o2(g) → 7…
\(C_7H_{16(l)}+11O_{2(g)}\to7CO_{2(g)} + 8H_2O_{(g)}\)
-
what type of reaction is shown below? 2 nabr (aq) + cl2 (g) → 2 nacl (s…
single replacement
-
what type of reaction is shown below? 2 kclo₃ (s) → kcl (s) + o₂ (g) sy…
decomposition
-
2. how do you determine the charges on the ions in an ionic compound?
To determine the charges on ions in an ionic compound: - For main - group metals (Groups 1 - 3), use their group number (Group 1: +1, Group 2: +2, Group 3: +3). - For main - group…
-
1. why do you think the term ionic is used to describe compounds formed…
The compound formed from a metal and a non - metal consists of ions (due to electron transfer from metal to non - metal) held by electrostatic forces, so the term "ionic" is appro…
-
now, look around your home and find at least 3 other examples of each t…
| Ionic compounds | Covalent Compounds | | ---- | ---- | | Sodium chloride (\(NaCl\)) | Water (\(H_2O\)) | | Calcium carbonate (\(CaCO_3\)) | Carbon dioxide (\(CO_2\)) | | Magnesi…
-
ionic compounds covalent compounds bonding ionic bonds covalent bonds d…
For Ionic Compounds (Description): metal, non - metal, non - metal, metal. For Covalent Compounds (Description): non - metals, share.
-
in problems 16 - 18, calculate δh for the reaction: 16. using the therm…
\(1\space kJ\)
-
practice it! select the statement(s) that are true about matter. matter…
- "Matter has mass." - "Some things are not made of matter." - "Matter takes up space."
-
8) choose the best answer. magnesium has an electronegativity of 1.31. …
ionic ### Question 9
-
6) choose the best answer. ionization energy is the opposite of potenti…
For question 7, the answer is \(2.13\).
-
4) choose the best answer. the difference in ______ determines whether …
4. electronegativity 5. ionic
-
3) drag and drop the words with the descriptions. the ability to attrac…
- 3) - "the ability to attract electrons": electronegativity - "the amount of energy needed to remove an electron from an atom": ionization energy - "the tendency for two atoms to…
-
1) choose the best answer. which compound would have a lower melting po…
a covalent compound without hydrogen bonding
-
14) choose the best answers. oxygen will ____ 2 electrons to form a ___…
14) B. gain; negative; anion 15) B. ionic
-
12) choose the best answers using a periodic table. (see companion mate…
12. \(AlBr_3\) 13. lose; positive; cation
-
10) choose the best answers using a periodic table. (see companion mate…
10) covalent bond 11) metallic bond
-
8) choose the best answers using a periodic table. (see companion mater…
8) covalent bond 9) ionic bond
-
the force of attraction for the shared pair of electrons is equally exe…
6. B. ionic bond 7. A. covalent bond
-
4) choose the best answer. the attraction of an atoms nucleus to the el…
4. electrostatic attraction 5. the force of attraction for the shared pair of electrons is equally exerted by atoms in the molecule
-
6. true or false: the temperature danger zone where bacteria grow best …
6. True 7. Wear reusable kitchen gloves for all food service activities. 8. True
-
2) choose the best answer. when an atom gains or loses an electron, an …
2) ionization 3) delocalized electrons
-
1) drag and drop the words with the descriptions. a bond where electron…
1. nonpolar covalent bond 2. polar covalent bond 3. diatomic molecules 4. covalent 5. ionic bond 6. metallic bond 7. delocalized electrons
-
3. the chemicals that are typically involved in foodborne illness inclu…
3. Floral perfumes worn by food service employees 4. Is safe to eat without additional cooking or preparation 5. Non - pregnant women
-
in problems 14 - 15, calculate δh for the reaction: so₂(g) + h₂(g) → h₂…
\(\Delta H=+34.4\ kJ\)
-
8) choose all that apply. which three elements can hydrogen form a hydr…
8) B. nitrogen, C. fluorine, D. oxygen 9) dispersion < dipole - dipole < hydrogen
-
6) choose the best answer. the strongest force of attraction is ____. i…
6) intramolecular force 7) fixative bond
-
4) choose the best answer. why do compounds form? because the electrost…
all of these # 5)
-
3) choose the best answers using the image. label b is pointing to whic…
intramolecular force
-
1) drag and drop the words with the descriptions. the type of attractio…
- the type of attraction between molecules: intermolecular forces - the attraction between the nucleus and electrons in an atom: electrostatic attraction - an attractive force tha…
-
25. choose the correct scientific notations. elements in a(n) ____ have…
group
-
23. choose the best answer. the most reactive nonmetal group is the ___…
23. B. halogens 24. C. \(63.87\) amu (There is an error in the initial selection. Using the formula \(M=\sum_{i}m_ix_i\) where \(m_i\) is the mass of the \(i -\)th isotope and \(x…
-
19. choose the best answer. the name of this isotope is_____ 243 - amer…
americium - 241
-
17. choose the best answer. which of these element groups is most react…
17. alkali 18. Noble gases
-
15. choose the best answer. what law revealed that the math did not wor…
15. law of triads 16. transition
-
13. use the periodic table to choose the best answer. —— would have an …
13. B. Oxygen 14. C. increase; increase
-
10. use the periodic table to choose the best answer. which of these el…
10. barium 11. Ca 12. K
-
8. use the periodic table to choose the best answer to find the electro…
\([Ne]\) ### Question 9
-
6. use the periodic table to choose the best answers to find the electr…
- **Question 6**: \(p\), \(s\) - **Question 7**: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}\)
-
4. use the periodic table to choose the best answer to find the electro…
4. 14 5. 3
-
1. choose the best answer. which metal group is the least reactive? nob…
transition
-
6. use a periodic table to choose the best answer. ____ is a period 4 e…
K ### Question 7
-
4. use a periodic table to choose the best answer. which element is mor…
4. Na 5. C
-
2. use a periodic table to choose the best answer. which of these eleme…
Rb # 3.
-
1. use a periodic table to choose the best answer. which element pairin…
Na and Br
-
3. match the term with its correct definition metalloid metal nonmetal …
Metalloid: an element with properties that are intermediate between those of metals and nonmetals. Metal: an element that typically has a shiny appearance, is solid at room temper…
-
investigating the different items, and conducting tests for malleabilit…
1. A. Metal F. Metalloid E. Metal D. Nonmetal C. Metalloid B. Nonmetal 2. Metals show strong reactions (such as bubbling or color changes) with hydrochloric acid and often with co…
-
1) choose the best answer. ____ is the measure of the ability of an ato…
1. Electronegativity 2. Ionization
-
3) choose the best answer. what element in group 17 has the highest ele…
3) B. \(F\) 4) A. \(F\)
-
6) describe what is happening to hydrogen in this image. hydrogen atom …
A hydrogen atom is gaining an electron to form a hydride ion (\(H^-\)), and energy is released as indicated by the electron - affinity concept.
-
7) choose the best answer. for alkali metals, how does reactivity trend…
7) B. It increases down a group. 8) B. It decreases down a group.
-
9) choose the best answer. for metals, how does reactivity trend in the…
9) It decreases across (left to right) a period. 10) It increases across (left to right) a period. 11) Rb
-
12) use a periodic table to choose the best answer. which element is mo…
12. Br 13. Cs 14. F
-
1) choose the best answer. what is one half of the distance between the…
1. atomic radius 2. electrostatic attraction
-
according to periodic trends, which period 3 element would have the low…
- First question: Cl - Second question: Li - Third question: P
-
12) choose the best answer. atomic radi down each group and generally _…
Atomic radius increases down each group and generally decreases across each period.
-
7) use a periodic table to choose the best answer. what is the process …
7. Ionization 8. K
-
8) check if each statement describes halogen or noble gas. noble gas ha…
- exist in all three states at room temperature: Halogen - colorless and odorless at room temperature: Noble Gas - has eight valence electrons: Noble Gas - comes in a variety of c…
-
7) choose all that apply. which three element pairs are likely to react…
Rb and Br, Fr and Cl, Li and Cl.
-
5) choose the best answer. what does halogen mean? salt former noble ga…
5) salt former 6) group 1 because they have one valence electron that the halogens need to be stable
-
3) choose the best answer. why are noble gases the least reactive nonme…
3) They have 8 valence electrons. 4) inert and monatomic
-
1) choose the best answer. what does inert mean? unstable stable reacti…
1. nonreactive 2. They have 7 valence electrons.
-
19. choose the best answer. which of these produce the most vibrant col…
19. alkali 20. 32
-
17. choose all that apply. which two sublevels does calcium have? s f d…
17. A. s, D. p 18. C. alkali
-
which element would be used for shorthand electron configuration for ca…
1. \([Ar]\) 2. 20
-
13. choose the best answer. what is the shorthand electron configuratio…
[Xe] \(6s^{2}4f^{14}5d^{10}6p^{4}\)
-
11. choose the best answer. what is the electron configuration for alum…
11. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}\) 12. 4
-
how many energy levels does calcium have? 40 4 2 20 10. choose the best…
- First question: \(4\) - Second question: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}\) (the option that matches this configuration)
-
7. choose the best answer. which of these element groups is the least r…
transition
-
5. choose the best answer. which of these element groups always have tw…
5. alkaline earth 6. group