Science

How did the study of the atom contribute to our understanding of the periodic table of the elements?(1 point)

Experiments that identified characteristics of atoms provided scientists with atomic weights and atomic numbers, which were used to organize the periodic table.
Experiments that identified characteristics of atoms provided scientists with atomic weights and atomic numbers, which were used to organize the periodic table.

The determination of electron charge led to an understanding of how atoms interact with one another, which facilitated the organization of the periodic table.
The determination of electron charge led to an understanding of how atoms interact with one another, which facilitated the organization of the periodic table.

Elements are made of atoms, so understanding atoms provided information about elements, which led to the organization of the periodic table.
Elements are made of atoms, so understanding atoms provided information about elements, which led to the organization of the periodic table.

Atoms are representative of elements, so scientists scaled up atomic characteristics to understand elemental characteristics, allowing scientists to arrange elements in a periodic table.
Atoms are representative of elements, so scientists scaled up atomic characteristics to understand elemental characteristics, allowing scientists to arrange elements in a periodic table.

Hydrogen is in Group 1 of the periodic table. Which kind of bond would form between two hydrogens?(1 point)

An ionic bond would form because both atoms are nonmetals.

An ionic bond would form because one hydrogen would transfer its valence electron to the other hydrogen to make a full shell.

A metallic bond would form because both atoms are metals.

A covalent bond would form because the electron would be shared so both hydrogens have a full, stable shell.

How are carbon atoms represented in this image?
(1 point)

blue circles

white circles

dark gray circles

red circles

Which functional groups are represented in this molecular structure?
(1 point)

a sulfhydryl group, a hydroxyl group, and a carboxyl group

a methyl group, a hydroxyl group, and a carboxyl group

a methyl group, an amino group, and a carboxyl group

a sulfhydryl group, an amino group, and a carboxyl group

A person is drinking a glass of soda with ice. Which option describes the relative kinetic energy of molecules in and above the soda in the glass?(1 point)

in: least energy

above: intermediate and greatest energy

in: least energy, , above: intermediate and greatest energy,

in: greatest energy

above: least energy

in: greatest energy, , above: least energy,

in: least and intermediate energy

above: greatest energy

in: least and intermediate energy, , above: greatest energy,

in: least energy

above: greatest energy

in: least energy, , above: greatest energy,

In an experiment involving a balloon, a scientist notices that the gas particles within the balloon begin to move faster, resulting in the balloon expanding. Which statement best describes the experiment?(1 point)

The scientist is investigating Charles’s law, which shows that temperature and volume are directly proportional.

The scientist is investigating Boyle’s law, which shows that pressure and volume are inversely proportional.

The scientist is investigating Boyle’s law, which shows that pressure and volume are directly proportional..

The scientist is investigating Charles’s law, which shows that temperature and volume are inversely proportional.

Which example accurately describes a solution? (1 point)

Nonpolar fat molecules dissolve in water, which is polar.

Polar sugar molecules dissolve in oil, which is nonpolar.

Polar sugar molecules dissolve in water, which is polar.

Nonpolar oil molecules dissolve in water, which is polar.

How do temperature changes lead to solubility changes for salt dissolved in water?(1 point)

High temperatures mean more kinetic energy, which keeps sodium and chlorine ions from combining, which increases solubility.

High temperatures mean that sodium and chlorine ions will be moving faster, increasing the odds that they will collide and combine. This reduces solubility.

High temperatures mean more of the salt will be in the gas form, causing it to evaporate out of the solution, decreasing solubility.

High temperatures mean more of the salt will be in the liquid form as it gradually melts, increasing solubility.

Which statement best describes a weak base?(1 point)

It donates protons and only partially dissociates in water.

It accepts protons and only partially dissociates in water.

It accepts protons and completely dissociates in water.

It donates protons and completely dissociates in water.

How is an atom of the element xenon (Xe) likely to act during a chemical reaction?
(1 point)

It will likely be unreactive.

It will likely gain electrons.

It will likely lose electrons.
.
It will likely share electrons.

Molecules that are made up of two of the same atom have nonpolar covalent bonds. Which statement best explains this property?(1 point)

No electrons are shared between the atoms.

One of the atoms transfers electrons to the other atom.

The atoms have the same electronegativity.

The atoms have the same number of valence electrons.

Please Help me if i fail this test my mother will sell my pc

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  1. We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.

    What are your choices?

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  2. I posted some of my answers, make sure to check them out!

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  3. Where did you post them. I dont see them

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  4. 1)How did the study of the atom contribute to our understanding of the periodic table of the elements?

    Elements are made of atoms, so understanding atoms provided information about elements, which led to the organization of the periodic table.

    Atoms are representative of elements, so scientists scaled up atomic characteristics to understand elemental characteristics, allowing scientists to arrange elements in a periodic table.

    Experiments that identified characteristics of atoms provided scientists with atomic weights and atomic numbers, which were used to organize the periodic table. (MY ANSWER)

    The determination of electron charge led to an understanding of how atoms interact with one another, which facilitated the organization of the periodic table.
    (2)Hydrogen is in Group 1 of the periodic table. Which kind of bond would form between two hydrogens?(1 point)

    A metallic bond would form because both atoms are metals.

    An ionic bond would form because one hydrogen would transfer its valence electron to the other hydrogen to make a full shell.

    An ionic bond would form because both atoms are nonmetals.

    A covalent bond would form because the electron would be shared so both hydrogens have a full, stable shell. (MY ANSWER)
    (3) How are carbon atoms represented in this image?

    red circles

    white circles

    dark gray circles (MY ANSWER)

    blue circles

    (4) Which functional groups are represented in this molecular structure?

    a sulfhydryl group, an amino group, and a carboxyl group

    a methyl group, an amino group, and a carboxyl group

    a sulfhydryl group, a hydroxyl group, and a carboxyl group

    a methyl group, a hydroxyl group, and a carboxyl group (MY ANSWER)
    (5)A person is drinking a glass of soda with ice. Which option describes the relative kinetic energy of molecules in and above the soda in the glass?)

    in: least energy

    above: greatest energy
    (6)In an experiment involving a balloon, a scientist notices that the gas particles within the balloon begin to move faster, resulting in the balloon expanding. Which statement best describes the experiment?

    The scientist is investigating Charles’s law, which shows that temperature and volume are directly proportional. (MY ANSWER)

    The scientist is investigating Charles’s law, which shows that temperature and volume are inversely proportional.

    The scientist is investigating Boyle’s law, which shows that pressure and volume are inversely proportional.

    The scientist is investigating Boyle’s law, which shows that pressure and volume are directly proportional.
    (7) Which example accurately describes a solution?

    Polar sugar molecules dissolve in oil, which is nonpolar.

    Nonpolar oil molecules dissolve in water, which is polar.

    Polar sugar molecules dissolve in water, which is polar. (MY ANSWER)

    Nonpolar fat molecules dissolve in water, which is polar.
    (8)How do temperature changes lead to solubility changes for salt dissolved in water?(1 point)

    High temperatures mean more of the salt will be in the liquid form as it gradually melts, increasing solubility.

    High temperatures mean that sodium and chlorine ions will be moving faster, increasing the odds that they will collide and combine. This reduces solubility.

    High temperatures mean more of the salt will be in the gas form, causing it to evaporate out of the solution, decreasing solubility.

    High temperatures mean more kinetic energy, which keeps sodium and chlorine ions from combining, which increases solubility. (MY ANSWER)
    (9) Which statement best describes a weak base?(1 point)

    It donates protons and only partially dissociates in water.

    It accepts protons and completely dissociates in water.

    It donates protons and completely dissociates in water.

    It accepts protons and only partially dissociates in water. (MY ANSWER)
    (10)How is an atom of the element xenon (Xe) likely to act during a chemical reaction?

    (1 point)

    It will likely gain electrons.

    It will likely lose electrons.

    It will likely be unreactive. (MY ANSWER)

    It will likely share electrons.

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  5. Guys I finished the test!

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  6. Experiments that identified characteristics of atoms provided scientists with atomic weights and atomic numbers, which were used to organize the periodic table.
    A covalent bond would form because the electron would be shared so both hydrogens have a full, stable shell.
    dark gray circles
    a methyl group, a hydroxyl group, and a carboxyl group
    in: least and intermediate energy
    above: greatest energy
    The scientist is investigating Charles’s law, which shows that temperature and volume are directly proportional.
    Polar sugar molecules dissolve in water, which is polar.
    High temperatures mean more kinetic energy, which keeps sodium and chlorine ions from combining, which increases solubility.
    It accepts protons and only partially dissociates in water.
    It will likely be unreactive.
    The atoms have the same electronegativity.
    AB + CD → AD + CB
    Oxygen is reduced, and iron is oxidized.
    The bond energy used to break the bonds in hydrochloric acid and sodium hydroxide is less than the energy released to form the bonds in water and sodium chloride.
    The total number of neutrons and the total number of protons are the same before and after the change.
    Fission is a process in which a large nucleus is split into smaller nuclei.
    A nucleus decays to produce a nucleus with one additional proton. Which type of decay did the nucleus undergo? beta-minus decay
    Which type of decay is a form of nuclear fission? alpha decay
    Increased mass results in reduced acceleration.
    Speed is a scalar quantity, and velocity is a vector quantity.
    not moving and is at rest.
    mass
    11 m
    855 N to the north and 795 N to the east
    Calcium carbonate and calcium oxide are formed at the same rate.
    300,000 km/s
    gravitational force
    130 kg-m/s
    8 kg-m/s northeast
    12 kg-m/s

    100% Trust Me!

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  7. Student is 100% correct, I just finished my test !!

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  8. Student Thank you Bro I love you man have a good day

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  9. Thank you student I love you so much

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  10. Thank you so much student saved my PC

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  11. Student, bro I hope your pillow is cold every night. I hope all your earbuds work all the time. I hope every plug in works the first time and you always manage to charge your phone before 0%.
    Your an absolute life saver

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  12. YOU JUST SAVED MY LIFE

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  13. Student is correct!!
    I wish u all a happy holidays and please relax during the break, ik school is stressful and having a portfolio/test in every subject all at the same time doesn't ever help, love you guys, stay safe❤

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  14. All of Student's answers are correct, but I want to note that my copy of the test had a few different questions. Here's what I had and the answers. Note: these might not correspond to your numbers!

    8. PH3 is a stronger acid than NH3.
    12. single replacement
    19. The rock with more mass will also have more force pulling it down, so the accelerations can be the same.
    23. There is an unbalanced force on the child, and the child's motion will change direction or increase speed.
    26. Its acceleration is positive from 0 seconds to 60 seconds.

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  15. read student's thing carefully. I only got one question wrong because i wasn't too careful reading.

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  16. yall this is the least toxic jiskha thread ive ever seen, tysm for the help!!

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  17. omg thank you sm student! i was on the verge of failing science if i didn't pass this final

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  18. Thank you so much

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