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November 2025

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Latest from November 2025

Why do atoms in groups 1A, 2A, and 3A of the periodic table tend to lose their valence electrons? (1 point) Responses Because they need to gain even more protons. Because they need to gain even more protons. To achieve a...
Asked by nebikenezer 1 answer
You are holding two negatively charged balloons. What will happen if you bring the balloons close to each other?(1 point) Responses The amount of the electrostatic force between the balloons will decrease, and they will...
Asked by Sarah 1 answer
According to the law of conservation of matter, what stays the same before and after a chemical reaction? (1 point) Responses The temperature and pressure of the system. The temperature and pressure of the system. The to...
Asked by nebikenezer 1 answer
In the chemical equation 4 Fe + 3 O₂ → 2 Fe₂O₃, what happens to the total number of atoms during the reaction? (1 point) Responses The total number of atoms stays the same. The total number of atoms stays the same. The t...
Asked by nebikenezer 1 answer
According to the law of conservation of matter, which statements correctly describe what happens to atoms during a chemical reaction? Read the choices carefully. (Select the two correct answers.) (1 point) Responses New...
Asked by nebikenezer 1 answer
Which ideas are key to balancing chemical equations and knowing what a reaction will make? (Select the two correct answers.) (2 points) Responses The reaction speed determines the final products. The reaction speed deter...
Asked by nebikenezer 1 answer
Select the correct answer(s) from the list(s).(1 point) A chemical shows the number and types of in a substance.
Asked by nebikenezer 1 answer
Select the correct answer(s) from the list(s).(1 point) Sodium chloride forms when sodium one valence electron to .
Asked by nebikenezer 1 answer
Select the correct answer(s) from the list(s).(1 point) During a chemical reaction, atoms in the rearrange to form new .
Asked by nebikenezer 1 answer
Use the reaction to answer the question. C10H8 + 12O2 → ? Which products are expected from the reaction? (1 point) Responses 10CO2 + 8H2O10 C O subscript 2 + 8 H subscript 2 O 10CO2 + 8H2O 10 C O subscript 2 + 8 H subscr...
Asked by nebikenezer 1 answer
Combustion reactions release _____blank.(1 point) Responses oxygen and carbon dioxide oxygen and carbon dioxide light, carbon dioxide, and water light, carbon dioxide, and water light and oxygen light and oxygen oxygen a...
Asked by nebikenezer 1 answer
Question Use the periodic table to answer the question. An illustration shows the periodic table of elements with elements arranged in increasing order of atomic number in 18 columns (groups) and 7 rows (periods). In a r...
Asked by nebikenezer 1 answer
Use the reactivity series to answer the question. An illustration shows many elements in a downward arrow with the element at the bottom being least unreactive and the element at the top being most reactive. In a replace...
Asked by nebikenezer 1 answer
Which option describes something that causes ionic bonds to form?(1 point) Responses combustion reactions combustion reactions replacement reactions replacement reactions large electronegativity differences large electro...
Asked by nebikenezer 1 answer
Isabella is researching how to charge objects through friction. Isabella rubs a balloon on her hair. When she pulls the balloon away from her hair, the hair is attracted to the balloon. Which BEST explains why the hair b...
Asked by Sarah 1 answer
Use the periodic table to answer the question. The periodic table of elements shows element groups, periods, and element properties. A reaction occurs that results in a molecule with two atoms of the same element. The at...
Asked by nebikenezer 1 answer
Which statement best explains why carbon bonds to four hydrogen atoms to form methane but to only two oxygen atoms to form carbon dioxide?(1 point) Responses Hydrogen shares electrons with carbon, but oxygen transfers it...
Asked by nebikenezer 1 answer
Use the periodic table to answer the question. The periodic table of elements shows element groups, periods, and element properties. Which atom generally obtains a stable configuration by sharing electrons? (1 point) Res...
Asked by nebikenezer 1 answer
How many valence electrons do most stable atoms have?(1 point) Responses eight eight one one four four two
Asked by nebikenezer 1 answer
Based on location in the periodic table, which element has chemical properties that are most similar to iodine (I)? (1 point) Responses selenium (Se) selenium (Se) fluorine (F) fluorine (F) calcium (Ca) calcium (Ca) xeno...
Asked by nebikenezer 1 answer
Use the table to answer the question. Elements with Their Electronegativity Element Electronegativity bromine 2.8 oxygen 3.5 nitrogen 3.0 phosphorus 2.1 Based on the information in the table, which pair of elements would...
Asked by nebikenezer 1 answer
A scientist is researching what happens when a neutral metal sphere located on an insulated stand is touched by a negatively charged rod. The set up for the scientist’s experiment is shown in the picture below. What will...
Asked by Sarah 1 answer
Which phrase best describes electronegativity?(1 point) Responses the number of electrons an element has the number of electrons an element has the relative strength with which an element attracts electrons in a chemical...
Asked by nebikenezer 1 answer
Use the periodic table to answer the question. The periodic table of elements shows element groups, periods, and element properties. Based on their locations in the periodic table, which two elements are most likely to f...
Asked by nebikenezer 1 answer
Question Which statement best assesses the impact of the cases Marbury v. Madison and McCulloch v. Maryland on the Constitution?(1 point) Responses Both cases did not increase any federal power. Both cases did not increa...
Asked by Mason 1 answer