The correct statement is:
"Metals can be hammered into thin sheets, and nonmetals are brittle."
This statement accurately describes the malleability of metals and the brittleness of many nonmetals.
Which statement about metals and nonmetals is correct?(1 point)
Responses:
Metals can be hammered into thin sheets, and nonmetals are brittle.
Metals and nonmetals can both be found in any column of the periodic table.
Most metals are a solid under normal conditions, and most nonmetals are a liquid.
Metals tend to be poor conductors of electricity, while nonmetals are strong conductors of electricity.
11 answers
Which statement best explains why hydrogen’s atomic number is equal to its mass?
Responses:
Hydrogen is stable, with two electrons in its outer shell.
Hydrogen does not have any neutrons.
Hydrogen is in the first row and the first column of the periodic table.
Hydrogen only has one electron
Responses:
Hydrogen is stable, with two electrons in its outer shell.
Hydrogen does not have any neutrons.
Hydrogen is in the first row and the first column of the periodic table.
Hydrogen only has one electron
The statement that best explains why hydrogen’s atomic number is equal to its mass is:
"Hydrogen does not have any neutrons."
Hydrogen has an atomic number of 1, which means it has 1 proton. The most common isotope of hydrogen (protium) also has 1 electron and no neutrons, giving it an atomic mass of approximately 1. This is why its atomic number is effectively equal to its mass for the most common isotope.
Use the periodic table to answer the question.
Which statement correctly compares the valence electrons for atoms of francium (Fr) and barium (Ba)?
Responses:
Barium has fewer valence electrons, but they are in a higher energy level.
Francium has more valence electrons, and they are in a higher energy level.
Barium has more valence electrons, and they are in a higher energy level.
Francium has fewer valence electrons, but they are in a higher energy level.
Which statement correctly compares the valence electrons for atoms of francium (Fr) and barium (Ba)?
Responses:
Barium has fewer valence electrons, but they are in a higher energy level.
Francium has more valence electrons, and they are in a higher energy level.
Barium has more valence electrons, and they are in a higher energy level.
Francium has fewer valence electrons, but they are in a higher energy level.
The correct statement that compares the valence electrons for atoms of francium (Fr) and barium (Ba) is:
"Francium has fewer valence electrons, but they are in a higher energy level."
Both francium and barium have 1 valence electron, as they are both in Group 1 of the periodic table. However, francium is located in the 7th period, meaning its valence electron is in a higher energy level (n=7) compared to barium, which is located in the 6th period (n=6).
Group 2 elements have two valence electrons. Which kind of bond will they most likely form, and why?
Responses:
A covalent bond is likely because they want to share those two valence electrons in order to become stable.
An ionic bond is likely because they are metals and will want to bond with nonmetals.
A metallic bond is likely because they are metals and can bond with other metals.
An ionic bond is likely because they will want to give away two valence electrons in order to become stable.
Responses:
A covalent bond is likely because they want to share those two valence electrons in order to become stable.
An ionic bond is likely because they are metals and will want to bond with nonmetals.
A metallic bond is likely because they are metals and can bond with other metals.
An ionic bond is likely because they will want to give away two valence electrons in order to become stable.
The correct statement is:
"An ionic bond is likely because they will want to give away two valence electrons in order to become stable."
Group 2 elements, also known as alkaline earth metals, typically have two valence electrons that they tend to lose in chemical reactions in order to achieve a stable electron configuration (like that of a noble gas). This tendency leads them to form ionic bonds, particularly with nonmetals, which can gain electrons to achieve stability.
why is carbon so useful in molecules for living things?(1 point)
Responses:
Many molecules in living things have millions of carbon atoms in them.
Carbon is produced in respiration, making it a readily available element.
Carbon can form the backbone for millions of compounds found in living things.
Carbon is produced in photosynthesis and carries the energy needed for life.
Responses:
Many molecules in living things have millions of carbon atoms in them.
Carbon is produced in respiration, making it a readily available element.
Carbon can form the backbone for millions of compounds found in living things.
Carbon is produced in photosynthesis and carries the energy needed for life.
The correct response is:
"Carbon can form the backbone for millions of compounds found in living things."
Carbon is unique in its ability to form stable covalent bonds with other atoms, including itself. This enables the formation of a vast variety of complex molecules, such as carbohydrates, proteins, lipids, and nucleic acids, which are essential for life.
n 3-5 sentences, summarize how the change of state from ice to water is affected by the relationship between kinetic energy and the forces of attraction.
The change of state from ice to water is influenced by the relationship between kinetic energy and intermolecular forces of attraction. In ice, the molecules are held in a rigid lattice structure by strong hydrogen bonds, resulting in low kinetic energy and limited molecular movement. As heat is applied, the kinetic energy of the molecules increases, causing them to vibrate more vigorously. When the energy surpasses the strength of the attractive forces, the rigid structure breaks down, allowing the molecules to move freely and transition into the liquid state of water. Thus, the increase in kinetic energy leads to a weakening of the forces of attraction, facilitating the phase change.
1 answer